Accident Overview
While on approach to Grand Haven Airport, the airplane experienced a simultaneous loss of power from both engines. The pilot lost control, leading to an aerodynamic stall. The aircraft subsequently crashed in Spring Lake, approximately three miles north of the airfield. Seven passengers sustained serious injuries, while the pilot and an eighth passenger were killed.
Probable Cause and Contributing Factors
The official investigation determined that the probable cause of the accident was engine failure on final approach due to mismanagement of fuel. Several contributing factors were identified:
- Fuel starvation
- Failure to maintain flying speed
- Failure to follow approved procedures
- Improper emergency procedures
- Attempted operation with known deficiencies in equipment
- Fuel system issues, specifically with pumps
- Right boost pump inoperative
- Crossing feed used to start the right engine
- Crossing feed found in the ON position
- Left inboard tank dry
Sequence of Events
As the airplane neared Grand Haven Airport, both engines ceased operation nearly simultaneously. The pilot was unable to maintain control, and the aircraft stalled. The subsequent crash occurred in Spring Lake, located about three miles north of the airport. Emergency services responded to the scene, and the injured were transported for medical care.
Investigation Findings
Investigators reviewed the fuel system and found that the right boost pump was inoperative. The crossing feed had been used to start the right engine and was later found in the ON position. The left inboard fuel tank had been depleted, leading to fuel starvation. The pilot's actions during the emergency did not align with approved procedures, and the attempt to operate the aircraft with known equipment deficiencies further compromised safety.