Incident Overview
An agricultural aircraft experienced an engine failure while conducting a spraying operation, necessitating a forced landing. The aircraft was subsequently destroyed by fire.
Pilot Account
The pilot reported that the flagger observed black smoke during the pull-up maneuver. The smoke later turned white and was seen emanating from the exhaust stacks.
Post-Accident Examination
Inspection of the engine following the accident revealed that the #3 cylinder head had separated above the cylinder barrel. No evidence of fire or impact damage was found in that area.
Conclusion
The forced landing and subsequent fire resulted from the engine failure, with the specific finding of a separated cylinder head.