What was found
ACRID, MUSTY SMELL THROUGHOUT CABIN & COCKPIT LAST 10 MINS OF FLIGHT. FIRST CLASS PAX COMPLAINED, COVERED NOSES & MOUTHS. SMELL STRONGER IN CABIN THAN FLIGHT DECK, VERY NOTICEABLE. ODOR HAD DISSIPATED AS WE PULLED INTO THE GATE. FOUND APU OIL LEAK, CORRECTED & REPLACED HEPA FILTERS.