On December 20, 1978, a Learjet 25 (registration N40SN) operated by Flight Training Center was involved in an aviation accident near Minneapolis-Saint Paul, United States of America during takeoff. No fatalities were reported. Investigators recorded the probable cause as: Uncontrolled collision with ground during initial climb due to inadequate preflight preparation on part of the pilot-in-command. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 2 related events involving the same aircraft type or operator are linked below.
An airplane was destroyed and all seven occupants seriously injured after an uncontrolled collision with the ground during takeoff from Minneapolis-St Paul Airport. The official probable cause cited inadequate preflight preparation by the pilot-in-command.
Accident Summary
During takeoff from Minneapolis-St Paul Airport, the airplane experienced an uncontrolled collision with the ground. The aircraft then skidded along the runway before coming to rest. The airplane was destroyed in the accident, and all seven occupants sustained serious injuries.
Investigation Findings
The official investigation determined the probable cause to be an uncontrolled collision with the ground during initial climb resulting from inadequate preflight preparation on the part of the pilot-in-command.
Contributing Factors
Several contributing factors were identified in the report:
Misuse or failure to use flaps
Accumulation of airframe ice
Incorrect trim setting
Presence of snow
Visibility of 3/4 mile or less
Snow or ice on the wings
Flaps set to 28°
Full nose-up trim
These factors collectively contributed to a situation where the aircraft was unable to maintain controlled flight after takeoff, leading to the collision with the ground.