Accident Overview
On an unspecified date, a Cessna 421 aircraft departed on a flight. Witnesses reported a routine takeoff and climb to an altitude of approximately 400 feet above ground level. At that point, engine power ceased or decreased. The right wing dropped, while the nose and left wing rose, causing the airplane to enter a nearly vertical descent. It subsequently impacted the terrain.
Investigation Findings
Post-accident examination of the engines and turbochargers revealed no evidence of pre-impact failures. Examination of the propeller governors indicated that the RPM setting was below that required for takeoff or climb power, though the exact RPM could not be determined. The pilot had recently purchased the aircraft. His previous multi-engine experience was primarily in Beech Barons, which have a throttle quadrant layout where the positions of the throttle and propeller controls are reversed compared to those in the Cessna 421. Additionally, the pilot had not completed a checkout in the Cessna 421. All four occupants were killed.
Probable Cause and Contributing Factors
According to the official findings, the accident sequence involved a loss of control during the initial climb. The probable cause was identified as the pilot's mismanagement of the propeller controls, resulting in reduced power. Contributing factors included improper transition or upgrade training, lack of recent experience in the aircraft type, and failure to maintain adequate airspeed. The subsequent uncontrolled descent led to collision with terrain, and a fire occurred.