Incident Overview
Approximately 10 minutes after takeoff, the pilot heard a loud "bang" from the engine, which subsequently lost power. The airplane began to vibrate, prompting the pilot to secure the engine by shutting off the fuel supply. An emergency was declared, and the pilot attempted to land in a bean field. However, due to insufficient speed and altitude, the airplane was unable to clear a tree line and struck the trees.
Post-accident Examination
Following the accident, the engine was disassembled. The examination revealed that the number 2 intake valve had been completely "swallowed" into the cylinder. The engine had accrued 1,700.49 hours since its last overhaul. The rated time-between-overhaul (TBO) for the Continental C-90-12F engine is 1,800 hours.
Investigation Findings
The investigation did not specify a probable cause. The engine failure was attributed to the intake valve being ingested into the cylinder, which led to the loss of power. No other factors were identified in the provided source.