NTSB Identification: DEN82DA029
14 CFR Part 91: General Aviation
Accident occurred Wednesday, February 03, 1982 in HAYDEN, CO
Probable Cause Approval Date: 02/03/1983
Aircraft: MITSUBISHI MU2B-40, registration: N149JA
Injuries: 6 Minor.

THE AIRCRAFT WAS 20 FEET AGL DURING LANDING WHEN THE CREW HEARD A PROPELLER GO INTO BETA MODE AND THE AIRCRAFT YAWED TO THE RIGHT. THE PILOT LOST CONTROL OF THE AIRCRAFT AND IT COLLIDED WITH A SNOW BANK WHICH SEPARATED THE WINGS FROM THE FUSELAGE. IMPACT DAMAGE MADE IT IMPOSSIBLE TO TELL WHY THE PROPELLER WENT INTO BETA MODE.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DIRECTIONAL CONTROL..NOT MAINTAINED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

REMEDIAL ACTION..NOT USED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

GROUND LOOP/SWERVE..UNCONTROLLED..PILOT IN COMMAND


Contributing Factors

PROPELLER SYSTEM/ACCESSORIES,PITCH CHANGE MECH..UNDETERMINED


Contributing Factors

PROPELLER SYSTEM/ACCESSORIES,REVERSING SYSTEM..UNDETERMINED


Contributing Factors

PROPELLER SYSTEM/ACCESSORIES,PROP CONTROL UNIT..UNDETERMINED


Contributing Factors

TERRAIN CONDITION..SNOWBANK

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