What was found
(AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL DETECTED BY FLIGHT ATTENDANTS. BEGAN ON DESCENT / (RESOLVED ON W/O: 522814 TASKCARD: NR-00001 ) TC 21-000-0002 C/W AS REQUIRED. REF TO LP 1949334 M313 MDDR 213397 FOR TC 21-000-003. REF TO TC 21-000-002. WHILE PERFORMING TC 21-000-002, SIGNS OF POSSIBLE OIL LEAK FOUND AROUND THE DRAIN PLUG OF THE APU GENERATOR. CONFIRMED OIL PRESENT AT APU GENERATOR DRAIN PLUG. APU GENERATOR P/N: BA1605-01, S/N: SA-AP2879 INSTALLED PREVIOUSLY. NO PARTS IN STOCK. REF REQ 19656 FOR DRAIN PLUG SEAL. APU REMAINS ON DEFERRAL. MEL 49-10-01A. (RESOLVED ON W/O: 523115 TASKCARD: NR-00002 ) PERFORMED TC 21-000-003. NO SMELLS NOTED AT THIS TIME"