As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 3029, DIRTY SOCK SMELL FUMES ON TAXI OUT THROUGH 8'000FT VERY FAINTLY. DISSEPATED IN THE CLIMB RETURNED ON DESCENT AT 7500FT COCKPIT WENT UP OXYGEN ENGINES OFF AT GATE. APU OFF FOR DURATION. PACK 1 ISOLATED PER QRH. FOUND OIL IN APU INLET. CORRECTIVE ACTION: REPLACED APU. (LP 5693482, 1073309)