What was found
F/A STATES DIRTY SOCK ODOR FROM TOP OF DESCENT UNTIL FINAL APPROACH, ACCOMP TC 21-000-001, RAN APU, ENGS 1 & 2 BLEED WITH PACKS 1 & 2. UNABLE TO DUP ODOR. APU OIL LEVEL IN RANGE & NO EVIDENCE OF OIL. C/W TC 21-000-002, NO SMELL, W/O 527112, PERFRMD T/C 21-000-003, OPS TEST GOOD. PERFMD T/C 05-000-011. FOUND OIL AT FCU DRAIN, APU PLENUM, & OIL COOLER FAN INLET & OUTLET. PERFRMD TSM 24-23-00-810-810-A. OPS TESTED APU IAW AMM 24-23-51-400-001 & AMM 49-00-00-860-008. FOUND APU GEN INOP. R & R APU GEN IAW AMM 24-23-51-400-001-A & AMM 24-23-51-000-001-A. OPS & LEAK CHKD GOOD. NO DEFECTS. PERFRMD TSM 24-41-00-810-810-A. BITE TEST GAPCU, TEST FAILED. R & R GAPCU IAW AMM 24-41-34-000-001 & AMM 24-41-34-400-001.