As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: MUSTY SOCK SMELL IN DESCENT TO WARM MOIST CLIMATE AT AUA. FLIGHT CREW REPORTED IT SMELLED STRONG IN CABIN SEAT 4C AND VERY STRONG FROM FLIGHT DECK OVERHEAD VENTS. MAINTENANCE REPLACED THE APU GEARBOX VENT LINE PER AMM 49-26-55 AND THE AIR-OIL SEPARATOR SEALS PER AMM 49-26-54. (AALA202602091980) A SATISFACTORY OPERATIONAL / LEAK CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED. ** (CLOSED)