What was found
INSPECTION TYPE-C, CABIN AIR DUCT OUTLET DOOR FITTING ASSY HAS HEAVY CORROSION AROUND MOUNT BOLTS. REMOVED AND REPLACED VALVE OUTFLOW NOZZLE IAW M/M 21-31-04.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
INSPECTION TYPE-C, CABIN AIR DUCT OUTLET DOOR FITTING ASSY HAS HEAVY CORROSION AROUND MOUNT BOLTS. REMOVED AND REPLACED VALVE OUTFLOW NOZZLE IAW M/M 21-31-04.