What was found
AIRCRAFT WAS GROUNDED: MISTY SOCK SMELL FOR SHORT TIME IN BRAKE THROUGH CLOUDS AND ARRIVING AT GATE WITH APU BLEED ON. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT FOR AALA202302236626: MAINTENANCE FOUND OIL CONTAMINATES IN THE APU AREA AND ACCOMPLISHED A CLEANING OF THE APU COMPARTMENT PER TASK CARD 26L31049009. THE APU LOAD COMPRESSOR WAS ALSO CLEANED PER TASK CARD 26T31049006. A SATISFACTORY LEAK CHECK OF THE APU WAS ACCOMPLISHED WITH NO ISSUE NOPTED. MAINTENANCE ACCOMPLISHED A DECONTAMINATION O F THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021004 WITH NO ODORS BEING NOTED** (CLOSED)