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They certainly purge the LOX, the TEA/TEB hypergolics, the cold-gas thrusters, and I think the left-over helium. Not sure about the kerosone. They pumped it into a tanker after the landing on land, but they might dump it in a barge landing. Everything they can get out of the tanks improves the stage's stability (free surface effect is the enemy). They also want to reduce the amount of energetic and/or toxic stuff in the stage when the crew boards the barge.

[QUOTE="TomS, post: 281072, member: 1484"] They certainly purge the LOX, the TEA/TEB hypergolics, the cold-gas thrusters, and I think the left-over helium. Not sure about the kerosone. They pumped it into a tanker after the landing on land, but they might dump it in a barge landing. Everything they can get out of the tanks improves the stage's stability (free surface effect is the enemy). They also want to reduce the amount of energetic and/or toxic stuff in the stage when the crew boards the barge. [/QUOTE]

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