Accident Details
On final approach to Rapid City Airport, the pilot encountered gusty winds and lost control of the airplane. The aircraft crashed in a huge explosion in a field. All nine occupants were killed.
Probable Cause
The official investigation determined the probable cause to be improper compensation for wind conditions on the part of the pilot, who failed to maintain flying speed. Inadequate preflight preparation and unfavorable wind component were also reported. An improperly loaded aircraft was considered as a contributing factor. Additionally, gusting wind up to 20 knots exceeded rearward center of gravity limits.
Investigation Findings
The investigation highlighted several factors: the pilot's failure to properly compensate for wind conditions, inadequate preflight preparation, and an unfavorable wind component. The aircraft's load distribution was found to be improper, contributing to loss of control. Gusty winds of up to 20 knots were present and exceeded the aircraft's rearward center of gravity limits, exacerbating the situation.