As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) RIB EXTENSIONS ON FLAP ASSY'S ON BOTH LT & RT FLAPS WERE WORN BY THE RIVETS HOLDING THE FLAP TRACKS ON THE WING. THE WEAR WAS AS MUCH AS 50 PERCENT MATERIAL THICKNESS.THESE 4 RIB EXTENSIONS WERE REPLACED. SIMILAR WEAR ON THE INBOARD & OUTBOARD RIB EXTENSIONS WERE WITHIN BLENDABLE LIMITS.