What was found
FLT#1791, PVD-RSW, FUMES PRESENT AFTER TAKEOFF NOTICED IN FLIGHT DECK AND AFT CABIN. ODOR ISOLATION CHECK LIST PERFORMED AND PACK 2 ISOLATED LEVEL 2 . APU OFF FUMES RETURNED ON DESCENT . LEVEL 3 SMOKE/ FUMES REMOVAL QRH COMPLETED; ACCOMPLISHED INFO NOTICE 2017-T015 STEP 1&2 ISOLATED FAULT TO TYPE 1 APU AND PACK # 2 PLACED APU AND PACK # 2 ON MEL L/P 4446300. WITH ENG RUN TSM 05-50-00-810-085 B . A/C OK FOR SVC.