What was found
FLT#2672, TPA-EWR. 'LEVEL 2 CABIN ODOR EVENT DURING CRUISE/ DESCENT DID NOT RESOLVE ON EITHER PACK AFTER FOLLOWING ISOLATION GUIDE. ODORS OBSERVED BY ALL FLIGHT CREW AND PERSISTED UNTIL LANDING; FOLLOWED TSM 71-00-00-810-801-A. FOR SMOKE AND OIL SMELL IN THE CABIN DUE TO OIL LEAKAGE. REMOVED AND REPLACED ENG #1 DE-OILER SEAL IAW AMM REF. 72-60-31. ALSO REPLACED HEPA FILTERS PER TSM 71-00-00-810-801-A. OPS CHECK GOOD. NO LEAKS NOTED. ENG RUN PERFORMED. A/C OK FOR CONT. SVC.