What was found
SHIP 5021 - FUME/MISC/DE - DUE TO: UPON DESCENT AS 4000', FLIGHT CREW OBSERVED ACIDIC FUME SMELL, PASSENGER IN ROWS 19,21 DEF SMELLED SIMILAR SMELL. FLIGHT CREW DONNED OXYGEN MASKS. CORRECTIVE ACTION: COMPLIED WITH WORK CARD 0550-2002, NO FAULTS FOUND. OPERATED BOTH ENGINES AT IDLE WITH MULTIPLY BLEED CONFIGURATIONS AND MULTIPLE ELECTRICAL CONFIGURATIONS. NO FAULTS NOTED. REPLACED RECIRCULATION AND AVIONICS VENT FILTERS. NO OTHER DISCREPANCIES NOTED. (LP 4950022)