What was found
AT ENG START TILL 10000 FT STRONG FOUL SMELL FROM PACKS ORD MX DEBRIEFED CREW, PER CREW SMELL FOUL ODOR SMELL RETURNED ON LANDING. PER TOMC AND AMM 5-51-26, REMOVED AND REPLACED RECIRCULATION AIR FILTER REF AMM 21-25-01 ADD EMP:U105424 PER TOMC STILL REQUIRES HIGH POWER RUN TOMC HAS BEEN CONTACTED, AND THEY WOULD LIKE US TO PERFORM AMM 05-51-26-800-801-C1 FOR THE SMOKE / ODOR FOCUSING ON THE ODOR SECTIONS AS IT IS NOT REPORTED AS AN ELECTRICAL SMELL. PERFORMED AMM 05-51-26-800-801-C1 FOR THE SMOKE / ODOR FOCUSING ON THE ODOR SECTIONS, PERFORMED ENGINE RUNS, ODOR NO LONGER PRESENT AT THIS TIME