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MOCR DE-BRIEF 
Frist = 4 items that followed through flight = FES, APU, 566 H[[subscript]]2[[/subscript]]O, FUEL CELL

APU
•WB 3 freeze-up.  (also froze during STS-1 - almost didn't load H[[subscript]]2[[/subscript]]O for STS-2) 7-8 min, all 3 froze ... 1+2 thawed - no oil T↑, 3 stayed frozen.  Oil T ↑ Shut down APU 3 ~1 min 20 sec early [WB3 thawed by IOS, known good for entry] (crew thought APU was lost)
[[left margin]] TRAINING [[left margin]] 
(never saw this failure in training)

• Fu Pump Vlv cooling failure: sys A. APU 1 not getting adequate cooling; switched to B, it didn't work either.  Post-flight data = initially, some cooling; [[symbols > over top of the ~]] 1 hr later, got cooling, but T peak had long since passed. (T hit ~250° F) ↑[[↑pointing at 250°]] bubbles  
Suspect vlvs corroded betw flights.

Testing betw STS-1 & -2 showed APU was safe to start, as long T < 200° at time of start.  (flight rules change from "as written for STS-2")
⇒ ∴ not a problem for nominal entry, but would be a problem for AOA
• did see evidence of oil filter clogging in APU 1 (post-flight data)..... cleared up  O.K.