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Upgrade of Singapore's A-4S - which was itself an upgrade of ex-USN/USMC A-4B (40 + 7 TA-4 conversions in 1972) & A-4C (70 + 16 TA-4 conversions from A-4Bs in 1980) airframes. The F404 engine replacements were done from 1986 on, with new navigation equipment & Maverick missile capability being added from 1991.Actually entered service... but was NOT supersonic, as the F-100-GE-100D did not have an afterburner.
Upgrade of Singapore's A-4S - which was itself an upgrade of ex-USN/USMC A-4B (40 + 7 TA-4 conversions in 1972) & A-4C (70 + 16 TA-4 conversions from A-4Bs in 1980) airframes. The F404 engine replacements were done from 1986 on, with new navigation equipment & Maverick missile capability being added from 1991.
Actually entered service... but was NOT supersonic, as the F-100-GE-100D did not have an afterburner.
