What was found
FLT#2105, BOS-TPA. 'DIRTY SOCK SMELL DURING FINAL DECENT LEVEL 1 ODOR & WHEN X BLEED OFF & PACK 1 OFF PER ODOR ISOLATION CHECK ODOR APPEARED TO DECREASE. IT WAS STRONGEST IN THE COCKPIT; PERFORMED INFO NOTICE 2017-T015J, REFERRED TO SECTION B2. C/W TSM 05-50-00-810-8311A(ID OF CAUSE OF ODOR) CORRECTIVE ACTION TYPE 1 (DUE TO APU OIL LEAK) LEVEL A. ACCOMPLISHED LEVEL A DECONTAMINATION OF ENVIRONMENTAL CONTROL SYSTEM ACCOMPLISHED IAW AMM 21-00-00-615-802A. SUSPECT APU OIL LEAK CONTAMINATED ECS. APU PLACED ON MEL 49-10-01A PERFORMED ECS SYSTEM CK. NO ODOR WAS NOTICED OK FOR SERVICE.