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Fuel
Main tanks contain
Transfer bay- sends fuel to pump bay
Pump bay- feeds fuel to engines and APU, senses fuel levels, neg g box
Neg g box- fuel for 3 sec neg g flt
Surge tanks hold #
Hold 2600 #
How many transfer and boost pumps in each main tank
2 transfer pumps and 2 boost pumps.
Transfer pumps: one operates at all times when AC POWER is applied. Send fuel from transfer bay to pump bay.
Boost pumps: provide fuel to engines from negative g box. One boost pump can feed 2 engines. Both operate continuously in flt
Override pumps
2 in each INBD, OUTBD, AFT Tank.
One pump overrides two boost pumps
Recovery fuel
18000
Min fuel
15000
Emergency fuel
10000
What tanks can gravity feed engines
Only main tanks can gravity feed if main tank boost pumps fail
How is fuel transfered
INBD, OUTBD, AFT transfer via override pumps through the interconnect using 2 crossover shutoff valves
Scavenge
Contaminates go to lowest point for removal. Then sent to engines and burned.
Fuel measurement
Primary and secondary computers.
60 quantity sensors. 10 temp sensors.
Heat exchangers how does it work
Hot fuel from HX is returned to tank determined by FMMS
Outboard cant feed inboard
Inbord cant feed outboard
Thermal mixing keeps fuel to the engine below what temp
180 F
Air refueling
Uses transfer manifold
3600 to 5200 ppm
Aitomatic disconnect when px exceeds 75 psi
Fuel dumping
No dumping if WOW
override and boost pumps operate as dump pumps
Each main fuel tank is subdivided into a transfer bay and the
Pump bay
If you want to move the CG aft where should you move the fuel
Move fuel to the outboard tanks
How do you switch to alternate pumps
If in MANUAL mode: you switch with alternate pumps switch on the ground power panel. If in NORM mode: it switches by itself
When is gravity feed necessary
Main tank fuel gravity feed if a boost pump or override pump is not providing fuel pressure. Engine is gravity fed during eng start before generators come online
How are the APUs fed
Gravity fed from the corresponding pump bay
Surge tank numbers
Holds 2,600 lbs
Appears on MDU: greater than 200 lbs
Vents overboard if accumulates more than 1200 lbs
Scavenge pumps send fuel where
Transfer to the inboard tanks
FMMS 3 works only in
Manual mode
Top 3 order of priority for FMMS operation
Engine fuel feed
Fuel CG control
Maintenance of full main tanks
AV 1-5 have how much unusable fuel
3000 pounds.
Normal recovery fuel
18,000 lbs
Minimum fuel
15,000 lbs
Emergency fuel
10,000 lbs
Tank fuel quantity error
Normal green. 2-10 percent blue. More than 10 yellow. If difference in fuel between 1,2 and fmms3
When A/R how are the tanks filled
Each tank is opened and filled simultaneously. CG is not computed at this time.
Unusable fuel us based on what
Pitch attitude.
Normal N. Command C. Manual M
Normal: auto controls the system
Command: command CG auto still controls.
Manual: manually control the system.
CG limit bars are red and appear when the aircraft CG is within?
1% MAC of a CG limit.
How many override pumps to override main tank pumps
1 override pump can override main tank pumps. Main tank has 2 main boost pumps that run continuously.
Why do we call it an override system
When automatically turner on or manually by the crew. Te aux tank pumps override the main tank pumps and allow the engines to feed from the selected tank due to the 50 psi higher pressure than the 35 psi main tank pumps. When fuel is transferred from an aux tank the aux tank is not used to feed the engines.
How does gravity feed get to the engines
Bypasses the heat exchanger
When do the mains scavenge
Always scavenge in flight
FMMS 3 accuracy
FMMS 3 gives fuel quantity readings on fuel panel but because no compensators. FMMS3 allows for manual control
FMMS control where to send fuel in what mode
Normal. FCS computes and commands CG
CG computation
CG is computed by FCS but controlled by AUTO and MAN. In MAN fuel is managed with the fuel panel. In auto fmms manages fuel.
Manually dump fuel where do you position outboard inboard aft selections
12 o'clock
When do you et a yellow P/T. Fuel caution association
P- boost pump or override pump has failed
T- transfer pump has failed
Fuel caution when one or two boost pumps fail in main tank.
Fuel caution when 2 transfer pumps have failed
Fuel caution when both override pumps have failed in aft, inboard, or outboard tank.
If nain tank boost oumps fail how to feed the engine
Fed by gravity feed from only main tanks.
What is the difference between AR DOOR and FUEL DOOR
FUEL DOOR- indicates a ground panel door or a ground scavenge panel door is open. * if airborne, leave gear extended to prevent damage
AR DOOR
Air refueling receptacle is not closed when commanded close. Or air refueling receptacle is not closed when in pen mode
What are the different indications for a pump failure
T- transfer pump in main tank is inop
P- override or boost pump is inop
What component determines CG control
FCS
Which FMMS computer can be used in auto
FMMS1 or 2
What components are capable of using fuel from gravity feeding
APU, and engines
What does the interconnect switch do
Allows fuel from each aux tank to gravity feed into the main tank transfer bay
What do the 2 surge tanks do
Collect fuel from the tank vent system
Holds 2600. After 200 appears SRG on MDU
Scavenge pumps activate and fuel transfers from surge tanks to inboard tanks
Fuel could vent overboard after landing if either surge tank has greater than 1200 lbs fuel in it
What PSI do aux override pumps use
50 psi main boost pumps use 35
Where does excess fuel go after it passes through heat exchangers in auto mode
Wherever the FMMS commands it for temperature control
Who controls the tank valves in AR manual mode
Pilots
What does the alternate fuel pump button do
Enables the other override pump in each aux tank and selects the other transfer pumps in each main tank during man fuel operations
Switch is located on the GPP
How do you fill the main tanks from the MFCP
Rotate the main tank knob yo the 6 o'clock position. Be in manual ops
What happens when you enter a desired fuel quantity into the DEP
If in AUTO mode, it closes all fill valves once the desired fuel quantity is reached causing a pressure disconnect. Must be in AUTO
What pumps failures will cause a caution light for a single pump failure
Main tank boost pumps
When does FMMS not try to maintain precise control of CG
When AR and dumping fuel
How can you tell if you have a tank quantity error
FUEL advisory on stat display: fuel quantity is in error by greater than 2 percent in any fuel tank
Color of tank quantity on MDU
Green is normal
Blue is 2-10 percent
Yellow is greater than 10
Blank (no display) data is invalid
Caused by FMMS 1 and 2 disagreeing
Apu is gravity fed how
From pump bay of main tank at 400 pph
FMMS 1 2
1 is primary 2 is alternate. 2 backs up 1 one doesn't back up 2
FMMS give what information
Quantity, temperature, total fuel, inlet fuel temperature, tank temperature
How to disconnect from AR
Stick first detent disconnects
Second detent resets the AR system
Main tank fill position
6 o'clock
Main tank transfer position
12 o'clock
How do you get to the refuel page
Gives total fuel requesting
Fuel door caution
Ground refuel door or scavenge panel door is open
MFCP advisory
A failure had occurred in the fuel panel or FMMS computer 3 has failed.
TCV 1,2,3,4
A fuel temperature control valve has failed. If failed shouldn't need to do anything but may need to reset circuit breaker
If MCV fails MCV 1,2,3,4
means it has closed and only getting cold air to the engine.
Mixing control valve has failed. Retard throttle to idle monitor display for increased engine inlet temperature. Pull fuel temp circuit breaker
During manual ground or air refueling do not simultaneously deselect more than how many fill valve buttons to close level control valves due to excess surge px causing disconnect or damage to transfer system
2
FMS
What is the bus controller for the primary avionics buses A,B,C
FMCP
IPU contains what
FMCP, DDUS
When does load shedding occur
Initiated by FMCP. When you lose 2 generators and the load on the third is 110% or greater. Or if you lose 3 generators.
How do you power on and off equipment
From the pwr format
How do you turn on tier one electrics
Use either one of two APS to apply power to IPU, DEP, DDU, FMCP, AVIP, FCC
Master power off
Takes 2 min. 1 for mx, 1 to pwr off equipment
How long for emer pwr off
30 seconds
What controls buses F and G
AVIP
What is on the F bus
SMRT, PSLU
What is on the G bus
CTC
Top 5 systems on the STAT display
FUEL, FCH, ELEC, ECS, ENG
How do you silence audible WCAs
Press master warning light. Press STAT button
How do you acknowledge WCAs
STAT button
How do you reprioritize WCAs
STAT button
Rescinded buttons are what color
Cyan. Stat removes it from the list
What does PURG do
Empties WCA and valid ones return
What is under CDS
DPU and MDUs and DEPs
DEP arrows
In- input data. Out-another format. Up- rotary switch. Up/down- there are more pages
CIDS on in
50 sec
DEP on in
10 sec
MDU on in
30 sec
How do you get the curser curser on CIDS
Click inboard twice to het there. It kicks other person off
What are the 4 times the CIDS display reverts to SFID
1. Dual FMCP failure
2. Both APS are turned off
3. 2 or more DPUs fail
4. Load shedding invoked by FMCPs
What can i set from the FDCP
Course select, baro px, command altitude, radar alt, command airspeed, heading
What are the 4 master modes
PEN, escape, landing/approach, normal
What master mode does the jet start in
Normal
How many attempts does the bus controller make to recover a component
14 attempts to recover a DPU. 3 recovery attempts for other equipment on the avionics and avionics interface buses
WCAs are displayed from
SMRT, F bus, AVIP, out of limits goes to DPU then master warn master caution displayed on MDU.
When is please standby on 2 MDUs
DPU interrupted
Please standby is on all MDUs if
Both FMCPs fail
If DPU cant receive data how recieve master warns
Master warning, master caution, and firelights are hardwired to aircraft analog sensors to alert crewmembers when DPU and FMCPs fail.
When do you get a DPU advisory
When 2 DPUs have failed. 1 is nothing. 3 is a warning
AVIN OTEMP
lost one processor and the remaining has overtrmped. Try to recycle from FMS page on DEP
MDU overtemp caution
MDU cooling air exhaust temperature rises above 165. Touch to determine then decrease display intensity. Remove power from the DEP PWR format
PSLU 1
Primary PSLU has failed: no monitor of deployable antenna, landing gear truck, landing gear position, and aux air doors
PSLU 2
Redundancy is lost. Initiate IBIT of affected PSLU
PSLU 1 and 2
Both PSLU have failed. Door position and weight on wheels not available
TARGA/PCMCIA card has how many gigs
220 MB
N1
Rotary fan speed
N2
Compressor speed
SSD has how many gigs
129 GB
Propulsion
How are the engines operated
Two compressor sections that are mechanically independent but aerodynamically coupled.
boundary layer diverter does what
1. Helps cool AMAD- hydraulic pumps and generators
2. Helps cool ECS precooler and intercooler
3. Coops the exhaust aft wing deck
What is the DEC what does it conrtrol
Digital Electronic Control
Controls: 1. engine fuel scheduling functions
2. Activation of torque motors used to set engine functions 3. Excitation of engine sensors 4. Power to operate fuel driven mechanisms for IGV
What is the primary controller
DEC
If the DEC fails what happens
System control automatically shifts to the MFC as the secondary. The label SEC MODE replaces the engine number on the engine display.
What are the reasons the DEC would shut down and pass control
The DEC passes control to the MFC. SEC MODE. if there is a loss of speed signal, a core overspeed, a less than idle condition, an electrical failure
How much is engine thrust reduced in SEC MODE
The inlet guide vanes are closed to a min airflow position, reducing thrust by as much as 60 percent.
Where does the APU vent
APU is mounted vertically to vent exhaust air out the top of the wing through electrically controlled hydraulically actuated exhaust doors
APU has a self start capability using stored air provided by
A rechargeable, high pressure pressurized air start system (PASS). TDC recharge px for the pass bottle. Pressurized to 1000 +/- 50.
What is the AMAD when can it be recoupled
Airframe mounted accessory drive. If decoupled, it can only be recoupled on the ground by Maintence.
Fire detection occurs when
If the loop senses temperatures exceeding 575F. Both elements if the sensing loop must register to provide a fire warning or tailpipe caution.
Do not open the aux air doors above
0.4 mach, severe structural damage will occur
What is the preferred starting source
APU. 1 is required 2 is desired. The one needs no malf.
APU doors are limited to what airspeed
250 KCAS
Auto engine start is unavailable on ground air to do auto engine start must use what source
APU
EGT readings come from thermocouple until what temperature? Switches over from therocouple to?
665C switches to pytometer
You could see a just in temperature on TBT between what temperature due to switch from thermocouple to pyrometer
665-685C
What is max motoring
Motoring after 10 seconds of n2 at or above 23 percent
Aux air doors
Max speed 0.4.
How is the bleed air operated
Spring loaded closed can manually operate
How is the anti ice operated
Is spring loaded open. Can manually operate
What is AD temp
AMAD oil is overheating. Shut down engine or decouple AMAD
What are the procedures for TAILPIPE 1,2,3,4
Tailpipe bay overheated
On ground- retard throttle if high temp persists- APU/engine stop. Chocks installed
In flight- retard throttles to idle. If high temp persists, shut down engine, motor engine
Engine oil temp pressure difference
SFID less than or equal to 15
MDU less than or equal to 10
APU doors open limit speed to
250 KCAS
Bleed air panel arrangement
5 down 2 up. 5 down are 4 bleeds and 1 crossover valve. 2 up are isolation valves
How long must it take to charge the PASS bottle?
30 minutes to recharge from 0 psi.
How is bleed air operated
Takes 5th and 9th stage bleed air. Electrically opened and spring loaded close
How is anti ice operated
Valve is electrically closed. Fails to open due to mechanical spring. Goes to the nose cone, inlet guide vanes, and front frame struts
Auto engine start is unavailable on ground air must use what source
APU
Caution after engine start if on ground for an extended time
At least once every 2 hours run engine at or above 85%n2 for 60 sec to prevent damage ti equipment. Oil might not scavenge when engine is at idle fir an extended time.
Do not exceed what for 5 min yo max eng life
85 percent n2
Alert start panel does what
Starts both APUs. Fire detection and extinguishing is automatic
Min time between starting a stopped engine
2 minutes after 0% N2
Throttle control system operates how
Connects to TPS (throttle position sensor) connects to TCU (thrust control unit) sends AC, DC signal to TCA (thrust control actuator)
ESCU malfunctions what is depected
AES light.
What does it mean if you get an AES light
ESCU cant decouple/recouple
AI/...
No icing detected
AI/Ice
Ice is detected
APU Door Advisory
APU door is open.
APU Door caution
Door is open at rotate. Stay under 250 KCAS
Aux door sequence
Closes at 0.3
Opens at 0.28
Overspeed at 0.4
TBT limitations
Max either: 843 10 sec, 890 instantaneous. 935 operational limitation.
Pass stands for
Pressurized air start system
Ice detection fail do what
Turn anti ice on. Avoid icing conditions
When can i auto start
1. I have at least one APU with no malf
2. Tailwind is less than 10 knots
3. Engines have been shut down longer than 90 minutes
When can i selective start
1. Tailwind is less than or equal to 20 knots
2. I have ground external air
3. I must if AES or AMAD green lights illuminated
4. I need to restart within 90 minutes.
Boundary layer has 3 channels
Channel 1. Eng bay x, channel 2 ECS, channel 3 engine bay y
Electrics
How many generators
4
What do the generators power
Generators power an AC bus
How are the generators connected to the AC bus
Connected by the GLC
What does the GCU do
Regulates voltage and frequencies. GCU controls the GLC and BTC.
What does the BTC-5 do
AC Comtactor. Controlled by the BCU. Permits the split parallel design feature.
What speed does the generator come online
60% N2
Whats in the electrical control panel
Sits to the pilots left front. Has:
Ext pwr: avail- meaning good power is available. On meaning switch activation
Flt contr batt: connects batteries to flight control buses
Util batt:connects main start bus to battery buses 2 and 3
DC bus tie relay switch: connects left and right dc sides: 1 to 3 and 2 to 4
Gen switch used to reset the generators and apply power to them
If generators do not come on line what do i do
Reset the generators
How many generators for mission
2
How many generators for safe recovery
1
DC bus tie is operated how
Done manually to connect the 2 DC sides: 1 to 3 and 2 to 4
TR failure on MDU electrics page. If boxed yellow TR
Transformer has failed, the failure in TR link to flight controls
If both TR and number are displayed
The TR has failed
Change in amperage number turns yellow on MDU electrics page.
Amperage is zero to that DC Bus supply
The limit in TR is how many amps
100 amps. TR limit
What are normal ops
Left and right side are split but they run parallel to each other.
What are current limiters
Act as fuses to protect against overload
If you close the bus tie relay what are you doing
Providing DC interconnection between left and right sides of aircraft. 1-3,2-4. Current limiters act as fuses on these lines.
Utility battery switch does what
Connects the main bus to batteries 2,3 to provide for:
1. Main start bus
2. APU start bus for non alert APU starts
3. Crew entry door, ladder, and entry lights
4. FWALDS and SFID
Power in descending order to flight control buses
TRs, PMG, then batteries. Batteries can support the flight control bus for at least 3 min.
Each flight control bus is powered by
2 TRs
Light cautions when in PEN mode
AR LIGHT= AR light control us out if off
LIGHT POD= wingtip nav position/anti collision lights are not fully retracted
On ground power panel how do i test bateries
Under BATT COND: When test button is pressed and held. GOOD illuminates if the batteries are st least 60% charged and a good connection exist.
ELEC caution
Means the generator has failed
ELEC advisory
TR output is less than 22 vults
Current limiter has failed
BTC 1,2,3,4 has opened
When do the emergency lights illuminate
Provide crew compartment lighting after a sudden deceleration or loss of DC power
What do the emergency lights illuminate
Light the hatch jettison handles snd the pressure door
When does load shedding occur from the FMCP
FMCP load sheds airborne only. Sheds when 3 generators have failed or when 2 generators have failed and the load on the 3rd is greater than or equal to 110
FMCP recovers equipment how
Automatically recovers shes equipment when generators are reset
BCU load shedding is initiated when
3 generators fail and remaining generator is overloaded for more than 5 seconds. Sheds by opening BTC-5; if conditions persist BTC is opened and generator protection is removed.
DC load shedding is how
Must be manually accomplished by the crew. Only required if 3 TR fail. Manually turn off equipment until TR load is less than 100 amps
What are GCU failure indications
Indicated only by .03 on gen.
AC bus tie offline.
BTC in parallel opens
BATT TEMP 1,2,3,4
Specified battery has overheated while charging.
Check electrical display and pull appropriate battery charger CB within 5 minutes.
SFID what does AC mean
No AC on the AC bus. None of the generators came online
Wingtip lights are what kind of lights
Retractable lights. LIGHT POD
What is a generator contactor
Gen to AC BUS
DC bus tie relay
Done manually
What is the bus tie contractor
Permits split parallel design feature controlled by BCU. Connects left to right or isolates the bus
What is a current limiter
It is a fuse. Provides circuit protection.
Btc 5 definition
Connects left and right AC systems
Battery can power FCS for how long
3 minutes
BCU is
The brains. Sole control of BTC 5. External power contactor. Generator protection disabler
Retractable lights
Consists of 2 position lights and an anti collision strobe light. Lights extend above snd below the surface of the wingtip
TR do what
Convert AC to DC
AC caution kight
Full loss of AC power/blank MDUs/only displayed on CID
Generator
AC generator/AMAD IDG constant speed. Come on at 62.
Flight control bus versus utility bus
Flight- connects bus 1,2,3,4 to their respective FCS buses (disconnects bat 2 from main start bus)
Utility- connects bat bus 2 and 3 to main start bus. Utility battery system: bus 3 provides backup power to main start bus in flight. Batteries 2,3 provide 4 things.
When are batteries powered
Battery buses are always powered
What must be up for the FWALDS test
CIDS
GCU stands for
General control unit. One per generator, regulates voltage and frequency
GLC definition
Generator line contactor. Connects generator to AC bus controlled by GCU
BTC definition
Bus tie connector. Permits split parallel design feature controlled by BCU
BCU definition
Bus control unit. Connects to BTC-5 connects left and right AC buses if a generator fails
Elec gen 4 fails
BTC 3 opens
BTC5 closes
GLC 4 open
Emergency light positions
ARM, DISARM, TEST
ECS
Bleed air system definition
Provides hot pressurized air to the ECS from 5th and 9th stage bleed air (9th stage added when 5th is too low below 85%)
Backup oxygen system definition
Provides 100% oxygen to the crew if necessary (if cabin alt exceeds 27,000 feet)
Equipment cooling system (ECS) definition
Contains 3 different heT transport sources to provide cooling:
Liquid cooling
Forced air
Emergency air (from cabin)
Cabin conditioning system (CCS) definition
Provides dry, filtered, temperature controlled air for crew compartment
Oxygen generation snd distribution system (OGADS) definition
Converts conditioned bleed air into oxygen enriched breathing quality air
Windshield defog system definition
Provides warm air to defog windshields. Controlled by CAS 1
Min: 10% ambient cabin temp
Med: 67% ambient cabin temp
Max: 85% 160F
DMS cooling system definition
Provides EGW to cool the DMS processors
Voice warning are only for what
Master warning (red light)
Will cautions give a voice warning
No i.e. ECS Caution
Warm air start checklist with GSE to power ECS
Ground power panel:
cabin conditioning switch-up
Cabin flow switch-as required (up unless weapons onboard)
Equipment cooling switch-up
Accessory drive panel:
ECS mode switch-on
How do you describe the windshield defog system
The temperature is automatically maintained at 160F when MAX DEFOG is selevted
When do the CAS controllers swap
1. On engine start
2. 15 seconds after WOW is removed
3. 30 sec after engine shutdown
(If 1 controller fails, the ECS is no longer redundant)h
Cabin px schedule
0-8000: ambient
8000-45,000: 8000 maintained
Above 45000: 8.78 PSI +/-2 PSI
Color difference on MDU display for CAS controller
White— FAILED/not receiving power
Yellow— degraded
What is the difference between degraded vrs. Failed
Degraded- something is malfunctioning in the system but overall system works (valve inop)
Fail- nothing on the system works (CAS 1 FAIL)
How many fans are on each avionics rack
2 fans, only one operates at a time. Alternate st each engine start.
What are the different racks
LT FWD
RT FWD
WNG BX
AFT EQUIP BAY
forced air system is not for pressurization
Describe the left and right EGW systems
1. Cools DMS
2. Cools radar (2 liquid sub systems to cool radar:EGW and silicate ester dielectric fluid
3. Cools forced air (not to be confused with secondary air)
4. Removes heat from ECS system
What is the normal position for bleed air valves on the bleed air control panel
5 down 2 up
5 down: 4 engine bleeds and ine crossover valve
2 up: left and right isolation valves
What does a cabin pack do
There are 2 cabin packs (1 for cabin pressure and 1 for weapons cooling)
1. Regulate canin temp from 45-97F
2. Cabin pressurization schedule
3. Cools weapons bay avionics
MDU: BL LEAK 1,2,3,4 or SFID: ECS BL L,R
Warning
Bleed air leak between the secondary pressure shutoff valve. Idle, close eng bleed valves, x-over
MDU: BL LEAK L,R or SFID: ECS BL L,R
Warning
Bleed air leak downstream of secondary shutoff valve.
MDU: CAB PRESS
Warning
Canin altitude above 11,000 feet
MDU: OXY REQ
Warning
1. Cabin pressure above 11,000 and the breathing regulator cabin air valve open.
2. Cabin pressure above 29,000 and backup oxygen not on.
MDU: AV OTEMP
Caution
Avionics cooling air is overheating (rack temp greater than 145F)
MDU: BL OTEMP L,R
Caution
Bleed air over temperature (335F)
MDU: BU OXY LOW
Caution
Backup oxygen is less than 400 psi
MDU: CAB PRESS
Caution cabin pressure sensors 1 and 2 have failed and the aft ravk pressure sensor failed/ invalid
MDU: DFOG OTEMP
Caution
Defog air temperature.
—defog control to min. If defog is required increase crew compartment airflow
Defog to max once clear, then min
MDU: ECS
SFID: ECS
Neither conditioned air system controller (CASC) is powered on the ground
MDU: ECS PRES 1,2,3,4
Bleed air overpressure between the engine bleed air and secondary pressure shutoff valves
MDU: MDU OVERTEMP
Overtemperature of MDU cooling air exhaust
MDU: OXY FAIL
OGADS: Oxygen Generation and Distribution System has failed
MDU: W/S OVERTEMP SFID: ECS
Over-temperature of anti ice and rain removal our above 308 for 11 sec.
MDU: BU OXY ON
Backup oxygen system is on
MDU: CAB AIR ON
An oxygen breathing regulator cabin air valve is open.
How does secondary air flow
500 degrees out of the eng. then y's to precooler or intercooler temp reduced to 250 degrees, if above 335 bleed air over-temp.
How do you get bleed air from one side to the other
Crossover valve
What provides air for crew compartment and racks
Cabin conditioning system
What happens when the alert and radiation switch is in arm
Filters out contaminants and arms the slap switch
How does air flow by the APU's
1 APU provides bleed air to the cabin pack. The other APU provides air to the equipment pack. Only one pack can operate per side.
Equipment cooling system is cooled how
Through EGW and heat exchangers. TRs are only thing liquid cooled
How many sub systems in equipment cooling sys
Radar has 2 sub systems, DMS one subsystem. DMS is single point if failure.
How to get air from APU to the pack
Isolation valves must be open. Apu maintenance mode 95%.
Bleed air normal configuration
5 down latched. 2 up latched
What are the undercool lights? How long do i have once undercool is identified
RT FWD, WNG BOX, MDU, AFT- aft equipment bay. 60 seconds or shutdown due to protect equipment
Equipment pack override
Turns off both equipment packs and begins emergency cooling.
Dump versus vent
Dump: 3 outflow valves open and stops airflow. Vent: lets air come in from cabin packs.
W/S display
When W/S is displayed anti ice or rain removal. If <50 18 psi. If >50 6psi. Rain removal is 6psi
Cabin temp position
9 oclock auto position
Cabin flow normal position
12 o'clock
Cabin cond switch
Allows CAS controllers to control canin packs for ground operation
Equipment cooling switch
Allows the CAS controllers to control equipment cooling for ground operation
Oxygen required comes on when
At 29,000 cabin alt without backup oxygen. Or if cabin pressure is above 11,000 and cabin air valve is open
When can you do a CAS bit
Only on the ground. Takes 7 min.
What does ECS reset do?
Resets the controllers
2psi
Need greater than 2 psi through the oxygen system or you are breathing cabin air. If less than 2 cabin air valve is open you get CAB AIR ON
When does bu oxygen turn yellow
Below 390 psi
BALDS
Bleed air leak detection system: prevents leak from 1,2,3,4 from getting out of hand.
When greater than 11000 PA what WCA will you get
Cabin alt, oxygen required, cabin press
Hydraulics
What is the purpose of the case drain
Hot excess fluid goes through the case drain then sends it to the heat exchanger then the reservoir to be reused
Each surface has how many actuators
2. Inboard elevons have 3.
Each actuator has how many systems
2 systems flowing through it.
If i lose 3 hydraulic systems can i still fly the plane why
Yes. The arrangement of primary and alternate hydraulic systems for each actuator and at least 2 actuators for each surface, means all flight control surfaces can be powered by any of the 4 hydraulic systems
How does the main gear release.
It is released by the actuator then falls by gravity
Each surface can receive power from 4 systems except?
GLAS. One actuator receives primary power from system 3 and alternate from system 4. The other actuator receives primary power from system 4 and alternate from 3.
What is the secondary flight control surface
GLAS. Not necessary for flight.
GLAS is supplied by what two systems what does it look like if it is failed
Supplied by system 3,4. If failed turns yellow. Never turns red.
PSLU does what
Proximity Switch Logic Unit. Monitors and controls: landing gear, wheel brakes, anti-skid, engine aux inlet doors, inflight refueling receptacle/latch in conjunction with the FCC.
Each PSLU provides
WOW, control to retract and extend the landing gear. Indications fir landing gear status display. Actuator position indications. Switching valve logic.
Sensor sends signal that doors are up closed
What do check valves do
Spring activates so fluid cannot go back that way. Closes the valve
What are the accumulators
Stores fluid under pressure then transformas 1800 psi to the 4000 psi nominal pressure
How many accumulators are there
10
Where are the accumulators
2 entry door, 1 brake, 2 APU, 4 reservoir (1,2,3,4), 1 main landing gear.
How many brake applications for the brake accumulator
10
Anti skid normal
Front to back
Antiskid alternate
Laterally paired forward to aft
What is your indication that the switching valve is bypass
When in bypass each component is isolated from its hydraulic system source and all other components powered by that system. You will not know but can look at the fluid level
How many switching valves are there
6
What does the emergency gear configuration look like
You will get an unsafe indication because nose gear wheelwell door remains open.
What is the concern with the gear if i lose systems 1 and 4
You lose normal braking. And landing gear norm extension
Main gear retraction 60degree sensor
A sensor checks the truck position. If the truck has not stowed within 60 degrees of gear retraction. The gear sequence is reversed and the affected gear free falls to the extended position.
If i lose system 1,2 i lose left aux air doors. 3,4 right aux air doors
How many isolation valves
3
When can NWS be activated
Low gain: max deflection is 27 degrees l,r. 9 degrees between 50-80
High gain: 65 degrees. Unless 265000 then 50 degrees. High gain should not be used above 10 knots
1 accumulator is required to extend the landing gear. Which system is required for nose gear
1 is primary for main, 4 is alternate, backup is the emergency accumulator. System 3 is the sole source of pressure for emergency extension of the NLG
How long do you have to hold the reset button for landing gear to reset
5 seconds
Do not reset the landing gear emergency lowering switch until at least how many seconds why
90 seconds after placing switch down. Allows the gear to extend and locks the door in full open position.
What does the yellow T mean
Truck level indicator means the truck does not natch the position commanded by the gear handle.
What does the yellow X mean
Indicates the gear is in transit
Yellow segmented double circle means
Unsafe gear and flashes when gear handle flashes
What do pumps provide
Volume not pressure
When does the fluid level change from blue to yellow
1,2,4 at 15 percent. 3 at 25 percent.
How many hydraulic failures populate s caution light
1
How many hydraulic failures populate a warning horn
3
At what pressure does the indication change from green to yellow
3000
When does the landing gear tone activate
Below 10000
Below 200
Below 90% N2 on all 4 engines for greater than 3 seconds
Landing gr up
What N2 percentage do the hydraulic pumps come online
20%
Hydraulic limits px
3000-5700 normal
4000 optimal
Hydraulic temp limits
-65-250 normal
100-150 optimal
Caution range begins at 251
Hydraulic Quantity range
1,2,4: 15% switches to alternate and isolates the low system
3: 25%
What is the difference between alternate and backup
Alternate can completely power the entire system. Back-up an accumulator for a given component
How many switching valves are there
6
Which system is dedicated to the FCS
System 2
Which side of the aircraft are pumps A and B associated with
A left side
B right side
Crossover manifold opens si one pump can power the entire system
What is on the landing light and brake panel
Landing and taxi light, parking brake, brake accumulator px, anti skid switch
The landing gear panel contains
Landing gr, down lock override, gear indicators, gear test button, horn silence.
How many degrees are you limited to if over 265,000 pounds
50
MDU: HYD SFID: HYD
Warning. Low hydraulic pressure in THREE hydraulic systems < 3000 psi
MDU: SURFACE SFID: SURFACE
Warning. Flight control surface locked out due ti hydraulic failure, actuator in bypass, or inoperative actuator
ART TEMP
Advisory. Actuator remote terminal is approaching overtemp
NWS OFF
Advisory shifts off
PARK BRAKE
Parking brake and antiskid switch on
MDU: ANTISKID
Caution. Gear down and antiskid switch off or antiskid failure
MDU: HYD 1,2,3,4
Caution. Hydro quantity low, pressure punp low, one pump failed, temp high. (15% or 25 on 3, less than 3000 psi, 251 degrees or greater)
MDU: MLG ACCUM
Caution. Main landing gear accumulator pressure is low
MDU: NWS FAIL
Caution. Nose wheel steering fault detected
Are are the hydraulic lines cooled
They are routed through the fuel tanks
MDU: GEAR DN AS
Caution. Airspeed faster than 250 and gear not up and locked
MDU: AFT DOOR
Caution Aft equipment bay door is open or lockout switch is in disable
MDU: ENTRY DOOR
Caution Entry door us not locked.
Main tanks contain
Transfer bay- sends fuel to pump bay
Pump bay- feeds fuel to engines and APU, senses fuel levels, neg g box
Neg g box- fuel for 3 sec neg g flt
Surge tanks hold #
Hold 2600 #
How many transfer and boost pumps in each main tank
2 transfer pumps and 2 boost pumps.
Transfer pumps: one operates at all times when AC POWER is applied. Send fuel from transfer bay to pump bay.
Boost pumps: provide fuel to engines from negative g box. One boost pump can feed 2 engines. Both operate continuously in flt
Override pumps
2 in each INBD, OUTBD, AFT Tank.
One pump overrides two boost pumps
Recovery fuel
18000
Min fuel
15000
Emergency fuel
10000
What tanks can gravity feed engines
Only main tanks can gravity feed if main tank boost pumps fail
How is fuel transfered
INBD, OUTBD, AFT transfer via override pumps through the interconnect using 2 crossover shutoff valves
Scavenge
Contaminates go to lowest point for removal. Then sent to engines and burned.
Fuel measurement
Primary and secondary computers.
60 quantity sensors. 10 temp sensors.
Heat exchangers how does it work
Hot fuel from HX is returned to tank determined by FMMS
Outboard cant feed inboard
Inbord cant feed outboard
Thermal mixing keeps fuel to the engine below what temp
180 F
Air refueling
Uses transfer manifold
3600 to 5200 ppm
Aitomatic disconnect when px exceeds 75 psi
Fuel dumping
No dumping if WOW
override and boost pumps operate as dump pumps
Each main fuel tank is subdivided into a transfer bay and the
Pump bay
If you want to move the CG aft where should you move the fuel
Move fuel to the outboard tanks
How do you switch to alternate pumps
If in MANUAL mode: you switch with alternate pumps switch on the ground power panel. If in NORM mode: it switches by itself
When is gravity feed necessary
Main tank fuel gravity feed if a boost pump or override pump is not providing fuel pressure. Engine is gravity fed during eng start before generators come online
How are the APUs fed
Gravity fed from the corresponding pump bay
Surge tank numbers
Holds 2,600 lbs
Appears on MDU: greater than 200 lbs
Vents overboard if accumulates more than 1200 lbs
Scavenge pumps send fuel where
Transfer to the inboard tanks
FMMS 3 works only in
Manual mode
Top 3 order of priority for FMMS operation
Engine fuel feed
Fuel CG control
Maintenance of full main tanks
AV 1-5 have how much unusable fuel
3000 pounds.
Normal recovery fuel
18,000 lbs
Minimum fuel
15,000 lbs
Emergency fuel
10,000 lbs
Tank fuel quantity error
Normal green. 2-10 percent blue. More than 10 yellow. If difference in fuel between 1,2 and fmms3
When A/R how are the tanks filled
Each tank is opened and filled simultaneously. CG is not computed at this time.
Unusable fuel us based on what
Pitch attitude.
Normal N. Command C. Manual M
Normal: auto controls the system
Command: command CG auto still controls.
Manual: manually control the system.
CG limit bars are red and appear when the aircraft CG is within?
1% MAC of a CG limit.
How many override pumps to override main tank pumps
1 override pump can override main tank pumps. Main tank has 2 main boost pumps that run continuously.
Why do we call it an override system
When automatically turner on or manually by the crew. Te aux tank pumps override the main tank pumps and allow the engines to feed from the selected tank due to the 50 psi higher pressure than the 35 psi main tank pumps. When fuel is transferred from an aux tank the aux tank is not used to feed the engines.
How does gravity feed get to the engines
Bypasses the heat exchanger
When do the mains scavenge
Always scavenge in flight
FMMS 3 accuracy
FMMS 3 gives fuel quantity readings on fuel panel but because no compensators. FMMS3 allows for manual control
FMMS control where to send fuel in what mode
Normal. FCS computes and commands CG
CG computation
CG is computed by FCS but controlled by AUTO and MAN. In MAN fuel is managed with the fuel panel. In auto fmms manages fuel.
Manually dump fuel where do you position outboard inboard aft selections
12 o'clock
When do you et a yellow P/T. Fuel caution association
P- boost pump or override pump has failed
T- transfer pump has failed
Fuel caution when one or two boost pumps fail in main tank.
Fuel caution when 2 transfer pumps have failed
Fuel caution when both override pumps have failed in aft, inboard, or outboard tank.
If nain tank boost oumps fail how to feed the engine
Fed by gravity feed from only main tanks.
What is the difference between AR DOOR and FUEL DOOR
FUEL DOOR- indicates a ground panel door or a ground scavenge panel door is open. * if airborne, leave gear extended to prevent damage
AR DOOR
Air refueling receptacle is not closed when commanded close. Or air refueling receptacle is not closed when in pen mode
What are the different indications for a pump failure
T- transfer pump in main tank is inop
P- override or boost pump is inop
What component determines CG control
FCS
Which FMMS computer can be used in auto
FMMS1 or 2
What components are capable of using fuel from gravity feeding
APU, and engines
What does the interconnect switch do
Allows fuel from each aux tank to gravity feed into the main tank transfer bay
What do the 2 surge tanks do
Collect fuel from the tank vent system
Holds 2600. After 200 appears SRG on MDU
Scavenge pumps activate and fuel transfers from surge tanks to inboard tanks
Fuel could vent overboard after landing if either surge tank has greater than 1200 lbs fuel in it
What PSI do aux override pumps use
50 psi main boost pumps use 35
Where does excess fuel go after it passes through heat exchangers in auto mode
Wherever the FMMS commands it for temperature control
Who controls the tank valves in AR manual mode
Pilots
What does the alternate fuel pump button do
Enables the other override pump in each aux tank and selects the other transfer pumps in each main tank during man fuel operations
Switch is located on the GPP
How do you fill the main tanks from the MFCP
Rotate the main tank knob yo the 6 o'clock position. Be in manual ops
What happens when you enter a desired fuel quantity into the DEP
If in AUTO mode, it closes all fill valves once the desired fuel quantity is reached causing a pressure disconnect. Must be in AUTO
What pumps failures will cause a caution light for a single pump failure
Main tank boost pumps
When does FMMS not try to maintain precise control of CG
When AR and dumping fuel
How can you tell if you have a tank quantity error
FUEL advisory on stat display: fuel quantity is in error by greater than 2 percent in any fuel tank
Color of tank quantity on MDU
Green is normal
Blue is 2-10 percent
Yellow is greater than 10
Blank (no display) data is invalid
Caused by FMMS 1 and 2 disagreeing
Apu is gravity fed how
From pump bay of main tank at 400 pph
FMMS 1 2
1 is primary 2 is alternate. 2 backs up 1 one doesn't back up 2
FMMS give what information
Quantity, temperature, total fuel, inlet fuel temperature, tank temperature
How to disconnect from AR
Stick first detent disconnects
Second detent resets the AR system
Main tank fill position
6 o'clock
Main tank transfer position
12 o'clock
How do you get to the refuel page
Gives total fuel requesting
Fuel door caution
Ground refuel door or scavenge panel door is open
MFCP advisory
A failure had occurred in the fuel panel or FMMS computer 3 has failed.
TCV 1,2,3,4
A fuel temperature control valve has failed. If failed shouldn't need to do anything but may need to reset circuit breaker
If MCV fails MCV 1,2,3,4
means it has closed and only getting cold air to the engine.
Mixing control valve has failed. Retard throttle to idle monitor display for increased engine inlet temperature. Pull fuel temp circuit breaker
During manual ground or air refueling do not simultaneously deselect more than how many fill valve buttons to close level control valves due to excess surge px causing disconnect or damage to transfer system
2
FMS
What is the bus controller for the primary avionics buses A,B,C
FMCP
IPU contains what
FMCP, DDUS
When does load shedding occur
Initiated by FMCP. When you lose 2 generators and the load on the third is 110% or greater. Or if you lose 3 generators.
How do you power on and off equipment
From the pwr format
How do you turn on tier one electrics
Use either one of two APS to apply power to IPU, DEP, DDU, FMCP, AVIP, FCC
Master power off
Takes 2 min. 1 for mx, 1 to pwr off equipment
How long for emer pwr off
30 seconds
What controls buses F and G
AVIP
What is on the F bus
SMRT, PSLU
What is on the G bus
CTC
Top 5 systems on the STAT display
FUEL, FCH, ELEC, ECS, ENG
How do you silence audible WCAs
Press master warning light. Press STAT button
How do you acknowledge WCAs
STAT button
How do you reprioritize WCAs
STAT button
Rescinded buttons are what color
Cyan. Stat removes it from the list
What does PURG do
Empties WCA and valid ones return
What is under CDS
DPU and MDUs and DEPs
DEP arrows
In- input data. Out-another format. Up- rotary switch. Up/down- there are more pages
CIDS on in
50 sec
DEP on in
10 sec
MDU on in
30 sec
How do you get the curser curser on CIDS
Click inboard twice to het there. It kicks other person off
What are the 4 times the CIDS display reverts to SFID
1. Dual FMCP failure
2. Both APS are turned off
3. 2 or more DPUs fail
4. Load shedding invoked by FMCPs
What can i set from the FDCP
Course select, baro px, command altitude, radar alt, command airspeed, heading
What are the 4 master modes
PEN, escape, landing/approach, normal
What master mode does the jet start in
Normal
How many attempts does the bus controller make to recover a component
14 attempts to recover a DPU. 3 recovery attempts for other equipment on the avionics and avionics interface buses
WCAs are displayed from
SMRT, F bus, AVIP, out of limits goes to DPU then master warn master caution displayed on MDU.
When is please standby on 2 MDUs
DPU interrupted
Please standby is on all MDUs if
Both FMCPs fail
If DPU cant receive data how recieve master warns
Master warning, master caution, and firelights are hardwired to aircraft analog sensors to alert crewmembers when DPU and FMCPs fail.
When do you get a DPU advisory
When 2 DPUs have failed. 1 is nothing. 3 is a warning
AVIN OTEMP
lost one processor and the remaining has overtrmped. Try to recycle from FMS page on DEP
MDU overtemp caution
MDU cooling air exhaust temperature rises above 165. Touch to determine then decrease display intensity. Remove power from the DEP PWR format
PSLU 1
Primary PSLU has failed: no monitor of deployable antenna, landing gear truck, landing gear position, and aux air doors
PSLU 2
Redundancy is lost. Initiate IBIT of affected PSLU
PSLU 1 and 2
Both PSLU have failed. Door position and weight on wheels not available
TARGA/PCMCIA card has how many gigs
220 MB
N1
Rotary fan speed
N2
Compressor speed
SSD has how many gigs
129 GB
Propulsion
How are the engines operated
Two compressor sections that are mechanically independent but aerodynamically coupled.
boundary layer diverter does what
1. Helps cool AMAD- hydraulic pumps and generators
2. Helps cool ECS precooler and intercooler
3. Coops the exhaust aft wing deck
What is the DEC what does it conrtrol
Digital Electronic Control
Controls: 1. engine fuel scheduling functions
2. Activation of torque motors used to set engine functions 3. Excitation of engine sensors 4. Power to operate fuel driven mechanisms for IGV
What is the primary controller
DEC
If the DEC fails what happens
System control automatically shifts to the MFC as the secondary. The label SEC MODE replaces the engine number on the engine display.
What are the reasons the DEC would shut down and pass control
The DEC passes control to the MFC. SEC MODE. if there is a loss of speed signal, a core overspeed, a less than idle condition, an electrical failure
How much is engine thrust reduced in SEC MODE
The inlet guide vanes are closed to a min airflow position, reducing thrust by as much as 60 percent.
Where does the APU vent
APU is mounted vertically to vent exhaust air out the top of the wing through electrically controlled hydraulically actuated exhaust doors
APU has a self start capability using stored air provided by
A rechargeable, high pressure pressurized air start system (PASS). TDC recharge px for the pass bottle. Pressurized to 1000 +/- 50.
What is the AMAD when can it be recoupled
Airframe mounted accessory drive. If decoupled, it can only be recoupled on the ground by Maintence.
Fire detection occurs when
If the loop senses temperatures exceeding 575F. Both elements if the sensing loop must register to provide a fire warning or tailpipe caution.
Do not open the aux air doors above
0.4 mach, severe structural damage will occur
What is the preferred starting source
APU. 1 is required 2 is desired. The one needs no malf.
APU doors are limited to what airspeed
250 KCAS
Auto engine start is unavailable on ground air to do auto engine start must use what source
APU
EGT readings come from thermocouple until what temperature? Switches over from therocouple to?
665C switches to pytometer
You could see a just in temperature on TBT between what temperature due to switch from thermocouple to pyrometer
665-685C
What is max motoring
Motoring after 10 seconds of n2 at or above 23 percent
Aux air doors
Max speed 0.4.
How is the bleed air operated
Spring loaded closed can manually operate
How is the anti ice operated
Is spring loaded open. Can manually operate
What is AD temp
AMAD oil is overheating. Shut down engine or decouple AMAD
What are the procedures for TAILPIPE 1,2,3,4
Tailpipe bay overheated
On ground- retard throttle if high temp persists- APU/engine stop. Chocks installed
In flight- retard throttles to idle. If high temp persists, shut down engine, motor engine
Engine oil temp pressure difference
SFID less than or equal to 15
MDU less than or equal to 10
APU doors open limit speed to
250 KCAS
Bleed air panel arrangement
5 down 2 up. 5 down are 4 bleeds and 1 crossover valve. 2 up are isolation valves
How long must it take to charge the PASS bottle?
30 minutes to recharge from 0 psi.
How is bleed air operated
Takes 5th and 9th stage bleed air. Electrically opened and spring loaded close
How is anti ice operated
Valve is electrically closed. Fails to open due to mechanical spring. Goes to the nose cone, inlet guide vanes, and front frame struts
Auto engine start is unavailable on ground air must use what source
APU
Caution after engine start if on ground for an extended time
At least once every 2 hours run engine at or above 85%n2 for 60 sec to prevent damage ti equipment. Oil might not scavenge when engine is at idle fir an extended time.
Do not exceed what for 5 min yo max eng life
85 percent n2
Alert start panel does what
Starts both APUs. Fire detection and extinguishing is automatic
Min time between starting a stopped engine
2 minutes after 0% N2
Throttle control system operates how
Connects to TPS (throttle position sensor) connects to TCU (thrust control unit) sends AC, DC signal to TCA (thrust control actuator)
ESCU malfunctions what is depected
AES light.
What does it mean if you get an AES light
ESCU cant decouple/recouple
AI/...
No icing detected
AI/Ice
Ice is detected
APU Door Advisory
APU door is open.
APU Door caution
Door is open at rotate. Stay under 250 KCAS
Aux door sequence
Closes at 0.3
Opens at 0.28
Overspeed at 0.4
TBT limitations
Max either: 843 10 sec, 890 instantaneous. 935 operational limitation.
Pass stands for
Pressurized air start system
Ice detection fail do what
Turn anti ice on. Avoid icing conditions
When can i auto start
1. I have at least one APU with no malf
2. Tailwind is less than 10 knots
3. Engines have been shut down longer than 90 minutes
When can i selective start
1. Tailwind is less than or equal to 20 knots
2. I have ground external air
3. I must if AES or AMAD green lights illuminated
4. I need to restart within 90 minutes.
Boundary layer has 3 channels
Channel 1. Eng bay x, channel 2 ECS, channel 3 engine bay y
Electrics
How many generators
4
What do the generators power
Generators power an AC bus
How are the generators connected to the AC bus
Connected by the GLC
What does the GCU do
Regulates voltage and frequencies. GCU controls the GLC and BTC.
What does the BTC-5 do
AC Comtactor. Controlled by the BCU. Permits the split parallel design feature.
What speed does the generator come online
60% N2
Whats in the electrical control panel
Sits to the pilots left front. Has:
Ext pwr: avail- meaning good power is available. On meaning switch activation
Flt contr batt: connects batteries to flight control buses
Util batt:connects main start bus to battery buses 2 and 3
DC bus tie relay switch: connects left and right dc sides: 1 to 3 and 2 to 4
Gen switch used to reset the generators and apply power to them
If generators do not come on line what do i do
Reset the generators
How many generators for mission
2
How many generators for safe recovery
1
DC bus tie is operated how
Done manually to connect the 2 DC sides: 1 to 3 and 2 to 4
TR failure on MDU electrics page. If boxed yellow TR
Transformer has failed, the failure in TR link to flight controls
If both TR and number are displayed
The TR has failed
Change in amperage number turns yellow on MDU electrics page.
Amperage is zero to that DC Bus supply
The limit in TR is how many amps
100 amps. TR limit
What are normal ops
Left and right side are split but they run parallel to each other.
What are current limiters
Act as fuses to protect against overload
If you close the bus tie relay what are you doing
Providing DC interconnection between left and right sides of aircraft. 1-3,2-4. Current limiters act as fuses on these lines.
Utility battery switch does what
Connects the main bus to batteries 2,3 to provide for:
1. Main start bus
2. APU start bus for non alert APU starts
3. Crew entry door, ladder, and entry lights
4. FWALDS and SFID
Power in descending order to flight control buses
TRs, PMG, then batteries. Batteries can support the flight control bus for at least 3 min.
Each flight control bus is powered by
2 TRs
Light cautions when in PEN mode
AR LIGHT= AR light control us out if off
LIGHT POD= wingtip nav position/anti collision lights are not fully retracted
On ground power panel how do i test bateries
Under BATT COND: When test button is pressed and held. GOOD illuminates if the batteries are st least 60% charged and a good connection exist.
ELEC caution
Means the generator has failed
ELEC advisory
TR output is less than 22 vults
Current limiter has failed
BTC 1,2,3,4 has opened
When do the emergency lights illuminate
Provide crew compartment lighting after a sudden deceleration or loss of DC power
What do the emergency lights illuminate
Light the hatch jettison handles snd the pressure door
When does load shedding occur from the FMCP
FMCP load sheds airborne only. Sheds when 3 generators have failed or when 2 generators have failed and the load on the 3rd is greater than or equal to 110
FMCP recovers equipment how
Automatically recovers shes equipment when generators are reset
BCU load shedding is initiated when
3 generators fail and remaining generator is overloaded for more than 5 seconds. Sheds by opening BTC-5; if conditions persist BTC is opened and generator protection is removed.
DC load shedding is how
Must be manually accomplished by the crew. Only required if 3 TR fail. Manually turn off equipment until TR load is less than 100 amps
What are GCU failure indications
Indicated only by .03 on gen.
AC bus tie offline.
BTC in parallel opens
BATT TEMP 1,2,3,4
Specified battery has overheated while charging.
Check electrical display and pull appropriate battery charger CB within 5 minutes.
SFID what does AC mean
No AC on the AC bus. None of the generators came online
Wingtip lights are what kind of lights
Retractable lights. LIGHT POD
What is a generator contactor
Gen to AC BUS
DC bus tie relay
Done manually
What is the bus tie contractor
Permits split parallel design feature controlled by BCU. Connects left to right or isolates the bus
What is a current limiter
It is a fuse. Provides circuit protection.
Btc 5 definition
Connects left and right AC systems
Battery can power FCS for how long
3 minutes
BCU is
The brains. Sole control of BTC 5. External power contactor. Generator protection disabler
Retractable lights
Consists of 2 position lights and an anti collision strobe light. Lights extend above snd below the surface of the wingtip
TR do what
Convert AC to DC
AC caution kight
Full loss of AC power/blank MDUs/only displayed on CID
Generator
AC generator/AMAD IDG constant speed. Come on at 62.
Flight control bus versus utility bus
Flight- connects bus 1,2,3,4 to their respective FCS buses (disconnects bat 2 from main start bus)
Utility- connects bat bus 2 and 3 to main start bus. Utility battery system: bus 3 provides backup power to main start bus in flight. Batteries 2,3 provide 4 things.
When are batteries powered
Battery buses are always powered
What must be up for the FWALDS test
CIDS
GCU stands for
General control unit. One per generator, regulates voltage and frequency
GLC definition
Generator line contactor. Connects generator to AC bus controlled by GCU
BTC definition
Bus tie connector. Permits split parallel design feature controlled by BCU
BCU definition
Bus control unit. Connects to BTC-5 connects left and right AC buses if a generator fails
Elec gen 4 fails
BTC 3 opens
BTC5 closes
GLC 4 open
Emergency light positions
ARM, DISARM, TEST
ECS
Bleed air system definition
Provides hot pressurized air to the ECS from 5th and 9th stage bleed air (9th stage added when 5th is too low below 85%)
Backup oxygen system definition
Provides 100% oxygen to the crew if necessary (if cabin alt exceeds 27,000 feet)
Equipment cooling system (ECS) definition
Contains 3 different heT transport sources to provide cooling:
Liquid cooling
Forced air
Emergency air (from cabin)
Cabin conditioning system (CCS) definition
Provides dry, filtered, temperature controlled air for crew compartment
Oxygen generation snd distribution system (OGADS) definition
Converts conditioned bleed air into oxygen enriched breathing quality air
Windshield defog system definition
Provides warm air to defog windshields. Controlled by CAS 1
Min: 10% ambient cabin temp
Med: 67% ambient cabin temp
Max: 85% 160F
DMS cooling system definition
Provides EGW to cool the DMS processors
Voice warning are only for what
Master warning (red light)
Will cautions give a voice warning
No i.e. ECS Caution
Warm air start checklist with GSE to power ECS
Ground power panel:
cabin conditioning switch-up
Cabin flow switch-as required (up unless weapons onboard)
Equipment cooling switch-up
Accessory drive panel:
ECS mode switch-on
How do you describe the windshield defog system
The temperature is automatically maintained at 160F when MAX DEFOG is selevted
When do the CAS controllers swap
1. On engine start
2. 15 seconds after WOW is removed
3. 30 sec after engine shutdown
(If 1 controller fails, the ECS is no longer redundant)h
Cabin px schedule
0-8000: ambient
8000-45,000: 8000 maintained
Above 45000: 8.78 PSI +/-2 PSI
Color difference on MDU display for CAS controller
White— FAILED/not receiving power
Yellow— degraded
What is the difference between degraded vrs. Failed
Degraded- something is malfunctioning in the system but overall system works (valve inop)
Fail- nothing on the system works (CAS 1 FAIL)
How many fans are on each avionics rack
2 fans, only one operates at a time. Alternate st each engine start.
What are the different racks
LT FWD
RT FWD
WNG BX
AFT EQUIP BAY
forced air system is not for pressurization
Describe the left and right EGW systems
1. Cools DMS
2. Cools radar (2 liquid sub systems to cool radar:EGW and silicate ester dielectric fluid
3. Cools forced air (not to be confused with secondary air)
4. Removes heat from ECS system
What is the normal position for bleed air valves on the bleed air control panel
5 down 2 up
5 down: 4 engine bleeds and ine crossover valve
2 up: left and right isolation valves
What does a cabin pack do
There are 2 cabin packs (1 for cabin pressure and 1 for weapons cooling)
1. Regulate canin temp from 45-97F
2. Cabin pressurization schedule
3. Cools weapons bay avionics
MDU: BL LEAK 1,2,3,4 or SFID: ECS BL L,R
Warning
Bleed air leak between the secondary pressure shutoff valve. Idle, close eng bleed valves, x-over
MDU: BL LEAK L,R or SFID: ECS BL L,R
Warning
Bleed air leak downstream of secondary shutoff valve.
MDU: CAB PRESS
Warning
Canin altitude above 11,000 feet
MDU: OXY REQ
Warning
1. Cabin pressure above 11,000 and the breathing regulator cabin air valve open.
2. Cabin pressure above 29,000 and backup oxygen not on.
MDU: AV OTEMP
Caution
Avionics cooling air is overheating (rack temp greater than 145F)
MDU: BL OTEMP L,R
Caution
Bleed air over temperature (335F)
MDU: BU OXY LOW
Caution
Backup oxygen is less than 400 psi
MDU: CAB PRESS
Caution cabin pressure sensors 1 and 2 have failed and the aft ravk pressure sensor failed/ invalid
MDU: DFOG OTEMP
Caution
Defog air temperature.
—defog control to min. If defog is required increase crew compartment airflow
Defog to max once clear, then min
MDU: ECS
SFID: ECS
Neither conditioned air system controller (CASC) is powered on the ground
MDU: ECS PRES 1,2,3,4
Bleed air overpressure between the engine bleed air and secondary pressure shutoff valves
MDU: MDU OVERTEMP
Overtemperature of MDU cooling air exhaust
MDU: OXY FAIL
OGADS: Oxygen Generation and Distribution System has failed
MDU: W/S OVERTEMP SFID: ECS
Over-temperature of anti ice and rain removal our above 308 for 11 sec.
MDU: BU OXY ON
Backup oxygen system is on
MDU: CAB AIR ON
An oxygen breathing regulator cabin air valve is open.
How does secondary air flow
500 degrees out of the eng. then y's to precooler or intercooler temp reduced to 250 degrees, if above 335 bleed air over-temp.
How do you get bleed air from one side to the other
Crossover valve
What provides air for crew compartment and racks
Cabin conditioning system
What happens when the alert and radiation switch is in arm
Filters out contaminants and arms the slap switch
How does air flow by the APU's
1 APU provides bleed air to the cabin pack. The other APU provides air to the equipment pack. Only one pack can operate per side.
Equipment cooling system is cooled how
Through EGW and heat exchangers. TRs are only thing liquid cooled
How many sub systems in equipment cooling sys
Radar has 2 sub systems, DMS one subsystem. DMS is single point if failure.
How to get air from APU to the pack
Isolation valves must be open. Apu maintenance mode 95%.
Bleed air normal configuration
5 down latched. 2 up latched
What are the undercool lights? How long do i have once undercool is identified
RT FWD, WNG BOX, MDU, AFT- aft equipment bay. 60 seconds or shutdown due to protect equipment
Equipment pack override
Turns off both equipment packs and begins emergency cooling.
Dump versus vent
Dump: 3 outflow valves open and stops airflow. Vent: lets air come in from cabin packs.
W/S display
When W/S is displayed anti ice or rain removal. If <50 18 psi. If >50 6psi. Rain removal is 6psi
Cabin temp position
9 oclock auto position
Cabin flow normal position
12 o'clock
Cabin cond switch
Allows CAS controllers to control canin packs for ground operation
Equipment cooling switch
Allows the CAS controllers to control equipment cooling for ground operation
Oxygen required comes on when
At 29,000 cabin alt without backup oxygen. Or if cabin pressure is above 11,000 and cabin air valve is open
When can you do a CAS bit
Only on the ground. Takes 7 min.
What does ECS reset do?
Resets the controllers
2psi
Need greater than 2 psi through the oxygen system or you are breathing cabin air. If less than 2 cabin air valve is open you get CAB AIR ON
When does bu oxygen turn yellow
Below 390 psi
BALDS
Bleed air leak detection system: prevents leak from 1,2,3,4 from getting out of hand.
When greater than 11000 PA what WCA will you get
Cabin alt, oxygen required, cabin press
Hydraulics
What is the purpose of the case drain
Hot excess fluid goes through the case drain then sends it to the heat exchanger then the reservoir to be reused
Each surface has how many actuators
2. Inboard elevons have 3.
Each actuator has how many systems
2 systems flowing through it.
If i lose 3 hydraulic systems can i still fly the plane why
Yes. The arrangement of primary and alternate hydraulic systems for each actuator and at least 2 actuators for each surface, means all flight control surfaces can be powered by any of the 4 hydraulic systems
How does the main gear release.
It is released by the actuator then falls by gravity
Each surface can receive power from 4 systems except?
GLAS. One actuator receives primary power from system 3 and alternate from system 4. The other actuator receives primary power from system 4 and alternate from 3.
What is the secondary flight control surface
GLAS. Not necessary for flight.
GLAS is supplied by what two systems what does it look like if it is failed
Supplied by system 3,4. If failed turns yellow. Never turns red.
PSLU does what
Proximity Switch Logic Unit. Monitors and controls: landing gear, wheel brakes, anti-skid, engine aux inlet doors, inflight refueling receptacle/latch in conjunction with the FCC.
Each PSLU provides
WOW, control to retract and extend the landing gear. Indications fir landing gear status display. Actuator position indications. Switching valve logic.
Sensor sends signal that doors are up closed
What do check valves do
Spring activates so fluid cannot go back that way. Closes the valve
What are the accumulators
Stores fluid under pressure then transformas 1800 psi to the 4000 psi nominal pressure
How many accumulators are there
10
Where are the accumulators
2 entry door, 1 brake, 2 APU, 4 reservoir (1,2,3,4), 1 main landing gear.
How many brake applications for the brake accumulator
10
Anti skid normal
Front to back
Antiskid alternate
Laterally paired forward to aft
What is your indication that the switching valve is bypass
When in bypass each component is isolated from its hydraulic system source and all other components powered by that system. You will not know but can look at the fluid level
How many switching valves are there
6
What does the emergency gear configuration look like
You will get an unsafe indication because nose gear wheelwell door remains open.
What is the concern with the gear if i lose systems 1 and 4
You lose normal braking. And landing gear norm extension
Main gear retraction 60degree sensor
A sensor checks the truck position. If the truck has not stowed within 60 degrees of gear retraction. The gear sequence is reversed and the affected gear free falls to the extended position.
If i lose system 1,2 i lose left aux air doors. 3,4 right aux air doors
How many isolation valves
3
When can NWS be activated
Low gain: max deflection is 27 degrees l,r. 9 degrees between 50-80
High gain: 65 degrees. Unless 265000 then 50 degrees. High gain should not be used above 10 knots
1 accumulator is required to extend the landing gear. Which system is required for nose gear
1 is primary for main, 4 is alternate, backup is the emergency accumulator. System 3 is the sole source of pressure for emergency extension of the NLG
How long do you have to hold the reset button for landing gear to reset
5 seconds
Do not reset the landing gear emergency lowering switch until at least how many seconds why
90 seconds after placing switch down. Allows the gear to extend and locks the door in full open position.
What does the yellow T mean
Truck level indicator means the truck does not natch the position commanded by the gear handle.
What does the yellow X mean
Indicates the gear is in transit
Yellow segmented double circle means
Unsafe gear and flashes when gear handle flashes
What do pumps provide
Volume not pressure
When does the fluid level change from blue to yellow
1,2,4 at 15 percent. 3 at 25 percent.
How many hydraulic failures populate s caution light
1
How many hydraulic failures populate a warning horn
3
At what pressure does the indication change from green to yellow
3000
When does the landing gear tone activate
Below 10000
Below 200
Below 90% N2 on all 4 engines for greater than 3 seconds
Landing gr up
What N2 percentage do the hydraulic pumps come online
20%
Hydraulic limits px
3000-5700 normal
4000 optimal
Hydraulic temp limits
-65-250 normal
100-150 optimal
Caution range begins at 251
Hydraulic Quantity range
1,2,4: 15% switches to alternate and isolates the low system
3: 25%
What is the difference between alternate and backup
Alternate can completely power the entire system. Back-up an accumulator for a given component
How many switching valves are there
6
Which system is dedicated to the FCS
System 2
Which side of the aircraft are pumps A and B associated with
A left side
B right side
Crossover manifold opens si one pump can power the entire system
What is on the landing light and brake panel
Landing and taxi light, parking brake, brake accumulator px, anti skid switch
The landing gear panel contains
Landing gr, down lock override, gear indicators, gear test button, horn silence.
How many degrees are you limited to if over 265,000 pounds
50
MDU: HYD SFID: HYD
Warning. Low hydraulic pressure in THREE hydraulic systems < 3000 psi
MDU: SURFACE SFID: SURFACE
Warning. Flight control surface locked out due ti hydraulic failure, actuator in bypass, or inoperative actuator
ART TEMP
Advisory. Actuator remote terminal is approaching overtemp
NWS OFF
Advisory shifts off
PARK BRAKE
Parking brake and antiskid switch on
MDU: ANTISKID
Caution. Gear down and antiskid switch off or antiskid failure
MDU: HYD 1,2,3,4
Caution. Hydro quantity low, pressure punp low, one pump failed, temp high. (15% or 25 on 3, less than 3000 psi, 251 degrees or greater)
MDU: MLG ACCUM
Caution. Main landing gear accumulator pressure is low
MDU: NWS FAIL
Caution. Nose wheel steering fault detected
Are are the hydraulic lines cooled
They are routed through the fuel tanks
MDU: GEAR DN AS
Caution. Airspeed faster than 250 and gear not up and locked
MDU: AFT DOOR
Caution Aft equipment bay door is open or lockout switch is in disable
MDU: ENTRY DOOR
Caution Entry door us not locked.
