What was found
AIRCRAFT LOST POWER IN CLIMB AND MADE AN OFF-FIELD LANDING. FOUND CYLINDER NR 1 BROKEN APPROXIMATELY 2 INCHES UP FROM BASE AND SEPARATED FROM CYLINDER BASE. NR 1 PISTON FOUND BROKEN THROUGH PISTON PIN BORE. UPPER HALF OF PISTON REMAINED IN CYLINDER WHILE LOWER HALF OF PISTON WAS GROUND UP IN ENGINE. PISTON PIN REMAINED INTACT IN ROD. SUBMITTER SUSPECTED PISTON FAILED AND SUBSEQUENTLY CAUSED CYLINDER BARREL TO FAIL AS IT WAS KNOCKED AROUND BY THE ROD/PIN.