As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 6820 COCKPIT AIR CONDITIONING HAS FOUL ODOR (DIRTY SOCK SMELL). PERSISTED ENTIRE FLIGHT. WORSE ON DESENT. ONCE ON APU BLEED SMELL NOT AS BAD. CORRECTIVE ACTION: TROUBLESHOT PER B757 FIM 21-00-01-301. RAN BOTH ENGINES AND FOUND LH ENGINE PROVIDED SOCK SMELL IN COCKPIT. PER B757 FIM 71-05-00. REF LOG PAGES 8754638 AND 8754640. CHANGED LT AND RT RECIRC FILTERS. (8754638