As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: MUSKY SOCK SMELL LAST 15 MINUTES OF FLIGHT IN BOTH FLIGHT DECK AND CABIN - MAINTNENANCE FOUND THE APU OIL COOLING FAN WAS LEAKING INTERNALLY AND REPLACED IT *AALA202609013204* MAINTENANCE ALSO FOUND THE APU GEARBOX VENT TUBE HAD EVIDENCE OF COKING AND REPLACED IT *AALA202609010725* - MAINTENANCE A DECONATMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WAS ACCOMPLISHED WITH NO LEAKS OR ODORS NOTED