Incident Summary
An agricultural pilot experienced a loss of engine power while executing the turnaround of the fourth swath run during an aerial application flight. The pilot immediately selected a forced landing area, dumped the load, and established an approach to the field. As the approach progressed, the pilot determined that he would be unable to reach the designated field. Consequently, he decided to land the airplane in the tops of trees. The pilot slowed the airplane to five miles per hour above the stall speed and settled the aircraft into the trees.
Post-accident Examination
A subsequent examination of the engine assembly failed to disclose a mechanical problem. However, a review of engine maintenance records revealed that the engine had been in service for 2,033 hours since the last overhaul. The manufacturer recommends a time between overhauls (TBO) of 1,200 hours. It should be noted that this TBO is not a mandatory requirement.
Possible Factors
A review of weather data indicated that conditions at the time of the accident were favorable for the formation of carburetor ice. The source does not state a probable cause for the loss of engine power.