As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A POST FLIGHT INSPECTION, A 10.25 INCH TEAR IN THE LEFT FLAP UPPER SKIN. TRAILING EDGE WAS DISCOVERED. THE UPPER AND LOWER FLAP SKIN TRAILING EDGES SHOWED EVIDENCE OF NEW CRACKS AROUND THE RIVETS IN THE TRAILING EDGE BEYOND THE DAMAGED SECTION. THE AIRCRAFT HAD BEEN ENGAGED IN GLIDER TOWING OPERATIONS PRIOR TO DAMAGE. PROBABLE CAUSE: PILOT IN COMMAND, USE OF FLAPS OUTSIDE OF MANUFACTURERS RECOMMENDATIONS. PILOT OPERATING HANDBOOK LIMITATIONS.