As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORT AIR CONDITIONING HAD A DIRTY SOCK SMELL. ON DECENT. MAINTENANCE FOUND OIL IN THE APU INTAKE. **SUPPLEMENTAL REPORT FOR AALA202209072425: MAINTENANCE FOUND OIL LEAKING FROM THE LOAD COMPRESSOR DRAIN LINE AND MATING SURFACE TO THE APU INLET. APU WAS REPLACED PER EO 4920Y003-001** (CLOSED)