What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORTED DIRTY SOCK SMELL THROUGH ENTIRE CABIN IN FLIGHT. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT FOR AALA202305308043: MAINTENANCE ACCOMPLISHED SMOKE ODOR FUME TROUBLESHOOTING TASK CARDS AND FOUND OIL RESIDUE IN THE APU COMPARTMENT. MAINTENANCE CLEANED THE APU COMPARTMENT, APU INLET AND OPERATED THE APU WITH NO LEAKS NOTED. MAINTENANCE ACCOMPLISHED THE DECONTAMIANTION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPISHED WITH NO ODORS NOTED. ** (CLOSED)