What was found
DISCREPANCY: REFERENCE LOG PAGE LP1090541 ITEM 1, IMMEDIATELY UPON TURNING ON APU BLEEN AND PACKS 1 AND 2, WE NOTICED AN OILY MUSTY SMELL ON FLIGHT DECK. ONE MINUTE LATER FLIGHT ATTENDANTS IN BACK CALLED TO INFORM US OF ODOR IN BACK OF AIRCRAFT, TRIED TO ISOLATE WHICH PACK, COULD NOT TELL. CORRECTIVE ACTION: REFERENCE LOG PAGE LP 1090541 ITEM 1, PLACED APU ON MEL 49-10-01A. CONTROL # 1144098. DEAD DATE 11/05/18. COMPLIED WITH MEL PROCEDURES. APU IS DEACTIVATED. AMM 49-10-00-040-008-A. REFERENCE LOG PAGE LP1090541 ITEM 2, PERFORMED BSI OF APU S/N P-4745 LOAD COMPRESSOR DIFFUSER AND LOAD COMPRESSOR IMPELLER TRAILING EDGES, NO OIL WETTING IN THESE AREAS REFERENCE STEPS 4.A. AND 4.B. AMM 49-20-00-200-003-A. REFERENCE LOG PAGE LP1090543 ITEM 2, REFERENCE TECH SERVICES WORK SCOPE DATED 10/17/2018. REMOVED AND REPLACED APU GENERATOR DUE TO EVIDENCE OF OIL LEAKING FROM AROUND GENERATOR PERFORMED OPS/LEAK CHECK OF APU GENERATOR, OPS/LEAK CHECK GOOD. AMM 49-42-51 PB401. REFERENCE LOG PAGE LP1090543 ITEM 3, TECH WORK SCOPE NOT REQUIRED DUE TO APU REPLACEMENT. SEE LP 1090544 ITEM 2, DUE TO EVIDENCE OF APU LEAKING INTERNAL. REFERENCE LOG PAGE LP1090544 ITEM 2, REFERENCE MDDR 1144098. REMOVED AND REPLACED APU IAW WORK TASK CARD MP49111-01 AND MP49111-02, OPS AND LEAK CHECKED OK. TORQUE WRENCHES F9TAB2956C 10/18, F9TAB2944C 5/19. NO ODORS NOTED./END/