On July 9, 1994, a Cessna T207 (registration N91056) operated by South Central Air was involved in an aviation accident near Kenai, AK. Investigators recorded the probable cause as: A surface-originated fatigue crack in the crankshaft at the number two crankcheek. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 3 related events involving the same aircraft type or operator are linked below.
An airplane experienced engine failure shortly after departure. Inspection found a surface-originated fatigue crack in the crankshaft at the number two crankcheek. The engine had 86 hours since overhaul by the operator.
Accident Overview
Following departure from the airport, the airplane experienced an engine failure. The pilot communicated with Alaska State Police personnel, stating that the aircraft had sufficient altitude to attempt a landing on the airstrip. The result of this landing is not detailed in available records.
Engine Inspection
A post-accident inspection of the powerplant revealed a fatigue crack that had originated on the surface of the crankshaft at the number two crankcheek. The crack had propagated due to repeated loading. At the time of the failure, the engine had been operated for a total of 86 hours since the last overhaul, which was performed by the operator.
Probable cause
A surface-originated fatigue crack in the crankshaft at the number two crankcheek.
What happened in the 9 Jul 1994 Cessna T207 accident near Kenai, AK?
An airplane experienced engine failure shortly after departure. Inspection found a surface-originated fatigue crack in the crankshaft at the number two crankcheek. The engine had 86 hours since overhaul by the operator.
What aircraft was involved and where did it happen?
The accident on 9 Jul 1994 involved a Cessna T207, registration N91056, operated by South Central Air, at Kenai, AK.
What was the probable cause of the accident?
A surface-originated fatigue crack in the crankshaft at the number two crankcheek.
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