N7801Q - 1979 Aircraft Aircraft Registration

The pilot’s misapplication of flight controls following an engine failure. Contributing to the accident was the failure of the sun gear, which resulted in the loss of engine power. Contributing to the sun gear failure were the engine manufacturer’s grandfathering of previously recommended, but less reliable, maintenance standards, the Federal Aviation Administration’s (FAA) acceptance of the engine manufacturer’s grandfathering, the operator’s inadequate maintenance practices, and the FAA’s inadequate oversight of the operator.