What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The Piper pawnee PA-25-235 was being used for glider towing operations. The pilot had done 4 tows prior to the failure and did not notice any problems before. At 1400 the Piper was making its 5 tow of the day on runway 26, and on the turn from crosswind the pilot stated that he heard a loud bang and then told the sailplane to release. The aircraft made a no power landing on runway 08. The # 3 cylinder had departed the aircraft through the cowling and a small oil fire erupted. The lost cylinder was searched for and could not be located. The aircraft had a current annual inspection and all AD have been complied with. The cylinder were repaired 80 hours prior to incident however the only work performed was chroming of the cylinders and reseating the valves. The engine had 510 smoh and 2400 hours tt.
As the FAA filed it
(-23) THE PIPER PAWNEE PA-25-235 WAS BEING USED FOR GLIDER TOWING OPERATIONS. THE PILOT HAD DONE 4 TOWS PRIOR TO THE FAILURE AND DID NOT NOTICE ANY PROBLEMS BEFORE. AT 1400 THE PIPER WAS MAKING ITS 5 TOW OF THE DAY ON RUNWAY 26, AND ON THE TURN FROM CROSSWIND THE PILOT STATED THAT HE HEARD A LOUD BANG AND THEN TOLD THE SAILPLANE TO RELEASE. THE AIRCRAFT MADE A NO POWER LANDING ON RUNWAY 08. THE # 3 CYLINDER HAD DEPARTED THE AIRCRAFT THROUGH THE COWLING AND A SMALL OIL FIRE ERUPTED. THE LOST CYLINDER WAS SEARCHED FOR AND COULD NOT BE LOCATED. THE AIRCRAFT HAD A CURRENT ANNUAL INSPECTION AND ALL AD HAVE BEEN COMPLIED WITH. THE CYLINDER WERE REPAIRED 80 HOURS PRIOR TO INCIDENT HOWEVER THE ONLY WORK PERFORMED WAS CHROMING OF THE CYLINDERS AND RESEATING THE VALVES. THE ENGINE HAD 510 SMOH AND 2400 HOURS TT.