NTSB Identification: DEN86LA050.
The docket is stored on NTSB microfiche number 30058.
Accident occurred Wednesday, December 18, 1985 in WIBAUX, MT
Aircraft: BEECH V-35B, registration: N24198
Injuries: 1 Serious,1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT STATED THAT LIGHT SNOW WAS FALLING AT THE ARPT AT THE TIME OF DEPARTURE. THE PAX STATED AFTER THE ACCIDENT THAT THE PLT ENCOUNTERED CLOUDS AT THEIR CRUISE ALT OF ABOUT 6000 FT. HE CONTINUED TO STATE THAT THE ACFT MADE A SHALLOW DESCENT AT FIRST ENCOUNTER WITH THE CLOUDS BUT BECAME VERY STEEP SEVERAL TIMES DURING THE DESCENT. THE ACFT BROKE OUT OF THE CLOUDS AND IMPACTED THE SNOW COVERED FIELD AT A HIGH RATE OF DESCENT AND AIRSPEED. THE PLT DID NOT PERFORM A PREFLIGHT INSPECTION OF THE ACFT, HE DID NOT DEICE THE ACFT PRIOR TO DEPARTURE AND HE DOES NOT HOLD AN INSTRUMENT RATING.

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

AIRCRAFT PREFLIGHT..MISJUDGED..PILOT IN COMMAND

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

ICE/FROST REMOVAL FROM AIRCRAFT..NOT PERFORMED..PILOT IN COMMAND

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

FLIGHT INTO KNOWN ADVERSE WEATHER..INITIATED..PILOT IN COMMAND

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

STALL..INADVERTENT..PILOT IN COMMAND



Contributing Factors

PREFLIGHT PLANNING/PREPARATION..POOR..PILOT IN COMMAND



Contributing Factors

OVERCONFIDENCE IN PERSONAL ABILITY..PILOT IN COMMAND



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