NTSB Identification: LAX97LA182.
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Accident occurred Wednesday, May 07, 1997 in TONOPAH, AZ
Probable Cause Approval Date: 05/04/1998
Aircraft: Ayres S2R-T-34, registration: N4011G
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.

The pilot was en route back to his landing strip after night spraying when the aircraft lost engine power. He also saw flames and debris coming from the exhaust stacks. The circuit breaker popped when he attempted to turn on the wing lights so he continued the approach without lights. During rollout, the aircraft struck an unseen irrigation ditch and the gear collapsed. An inspection showed evidence of heat and blade damage to the power turbine. The fuel control adjustment was found in the full rich position. There was no evidence of FOD to the compressor rotor and stator assemblies. The engine had a hot section inspection as a result of a previous sudden engine stoppage incident.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

the failure of the power turbine due to an overtemperature condition created by an improperly adjusted fuel control. A factor in the accident was the tripped circuit breaker which prevented the wing lights from operating during the forced night landing.

Full narrative available

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