What happened
The pilot was operating an aircraft under instrument flight rules, climbing through instrument meteorological conditions (IMC). The aircraft was being radar vectored toward its destination airport. During this climb phase, the engine experienced a total failure. The root cause was identified as a failed connecting rod bolt which caused the engine to lock up completely.
At approximately 300 feet above ground level and one and a half miles from the airport, the pilot broke out of the clouds. With no option to return to the airport, he executed a forced landing in a muddy cotton field. Upon impact, the nose gear contacted the soft ground, causing the aircraft to flip into an inverted position.
The investigation
A review of the maintenance records for the engine revealed that it had been top overhauled three times throughout its operational life. However, the records indicated that the engine had never undergone a major overhaul.