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. **ORIGINAL REPORT WAS AALA202602024344 SUBMITTED 2/2/26 BY TUL** 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.