As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INSPECTION BOTH FLAPS RT AND LT TOP AND BOTTOM FLAP SKINS WERE CRACKED 6 TO 8 INCHES ALONG THE T/E, ON THE RIVET LINE. ALSO SHEERED RIVETS ON (3) OF THE (4) FLAP TRACK LOWER TRACK TO RIBS. RESKINNED FLAPS AND INSTALLED MS21042 STEEL SCREWS IN REPLACEMENT OF THE SHEERED RIVETS. PROBABLE CAUSE BY FLAP OVERSPEED WITH HIGH G, LOADS. THIS AIRCRAFT TOWS GLIDERS ALL THE TIME. (K)