What was found
FLT 345, BOS-BCN. INFLIGHT REPORTED STRONG DIRTY SOCK ODOR/FUMES ON APPROACH. WAS ALSO DETECTED, NOT AS STRONG, IN COCKPIT PASSING 3000' ON APPROACH; COMPLIED WITH INFORMATION NOTICE 2017-T015 STEP 1 ISOLATED FAULT TO TYPE 10 PER TSM 05-50-00-810-085B / TSM 05-50-00-810-085D AIRCRAFT IS OK FOR SERVICE. POSSIBLE ENVIRONMENTAL CONTAMINATION. BOTH ENG RUNS WITH PACK AND BLEED ON NO ODOR OR SMELL NOTED.