What happened
The aircraft was operating in cruise flight when it experienced a sudden loss of engine power. Unable to maintain altitude or reach a suitable landing site, the pilot attempted an emergency landing near a body of water. The aircraft undershot the intended target, coming to rest short of the lake.
The investigation
A post-accident examination of the aircraft's engine revealed significant mechanical failure. Investigators found that the number 2 bearing had completely disintegrated and was missing from its designated seat within the engine assembly. Analysis of the failed component indicated evidence of high temperature exposure and a lack of oil lubrication, suggesting severe internal friction and wear prior to the catastrophic failure.
Findings
The primary factor in this incident was the mechanical failure of the engine's number 2 bearing. The disintegration of the bearing led directly to the loss of engine power during cruise flight. Contributing factors included evidence of high temperatures and insufficient oil lubrication within the engine, which likely accelerated the wear process leading to the catastrophic breakdown.