Accident Sequence
The aircraft experienced a longer-than-normal takeoff, according to the pilot, who stated he used full power. The density altitude was calculated to be 9,286 feet. After takeoff, the pilot reported raising the landing gear, though a witness disagreed. The flight then reduced power, and as the RPM decreased, the manifold pressure was noted to be only 24 inches. The aircraft began a descent that the pilot said could not be stopped with power, so he opted to land in a pasture with the gear down. During the subsequent ground roll of approximately 1,500 feet, the aircraft struck two ditches and a fence.
Injuries
All four occupants sustained injuries in the accident, with two suffering serious injuries.
Probable Cause
The official findings cited several factors: the pilot's poor preflight planning, failure to use weight and balance and performance data, overconfidence in personal ability, improper use of throttle/power control, delayed remedial action, and failure to maintain airspeed, all compounded by high density altitude.