NTSB Identification: CHI02LA227.
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Accident occurred Wednesday, July 31, 2002 in Donahue, IA
Probable Cause Approval Date: 04/18/2003
Aircraft: Jackovich Pitts S1D, registration: N29FJ
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
While maneuvering, the engine and propeller stopped completely and a forced landing was executed into a bean field. On landing the airplane flipped over completely, coming to rest upright again, and was substantially damaged. The pilot reported entering a departure stall with full power which resulted in a relatively high pitch attitude. Immediately prior to the stall, the power was reduced to idle and the nose dropped rapidly as the aircraft stalled. The pilot reported that the aircraft may have experienced some rearward motion due to the high pitch attitude and abruptness of the stall. During the stall, the pilot stated that the engine and propeller both stopped completely. Attempts to start the propeller windmilling were not successful. The aerobatic engine had been modified to exhibit an "enhanced compression ratio", which increased propeller resistance to windmilling during the restart attempt. The amateur-built airplane did not have an engine starter installed. A post-accident engine examination revealed no anomolies determined to have existed prior the accident and/or attribuitable to the loss of power.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: A loss of engine power for undetermined reasons. Full narrative available
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