As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERAL CRACKS IN SKIN THROUGH RIVET HOLES IN TRAILING EDGE. THIS SKIN IS IN THE FLAP BAY. SUSPECT FAILURE IS DUE TO FLEXING OF TRAILING EDGE, CAUSED BY TURBULENCE IN SLOW FLIGHT WITH FLAPS LOWERED. AIRCRAFT IS USED SOLELY FOR FLIGHT TRAINING.