As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION OF THE COLLAR BOLTS ON THE INBOARD MAIN FLAP COLLAR FITTING (LT & RT) AT THE INBOARD END OF THE FLAP REVEALED CORROSION IN THE HOLE BORES OF THE FITTINGS. THE DAMAGED COLLAR FITTINGS WERE REMOVED AND REPLACED PER BAC S/B 57A0066 AND ER/A 088153-14AD.