NTSB Identification: DEN86FA071.
The docket is stored on NTSB microfiche number 30828.
Accident occurred Sunday, February 02, 1986 in KALISPELL, MT
Aircraft: CESSNA 180, registration: N2874K
Injuries: 1 Fatal,1 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT RECEIVED A WX BRIEFING AND FILED AN IFR FLT PLAN TO BOEING FIELD, SEATTLE, WA. HE DEPARTED KALISPELL, MT, AT 1135 MST. WHEN THE PLT ARRIVED IN THE SPOKANE AREA, HE OBTAINED WX REPORTS FOR SEATTLE AND DECIDED TO TURN AROUND AND RETURN TO KALISPELL. WX AT KALISPELL HAD DETERIORATED. THE PLT WAS CLEARED FOR A CONTACT APCH. THE PLT ADVISED THE SALT LAKE ARTCC THAT HE HAD A SMALL LAKE IN SIGHT BELOW, WAS CANCELLING IFR AND PROCEEDING VFR. ICE FISHERMEN OBSERVED THE ACFT MAKE SEVERAL PASSES OVER THE LAKE THEN HEARD THE SOUND OF IMPACT. THEY DESCRIBED THE WX AS LOW CEILING, REDUCED VISIBILITY, SNOW, AND FOG. ALTHOUGH THE PLT COULD NOT RECALL THE EVENTS LEADING UP TO THE ACCIDENT, HE SURMISED THAT HE MAY HAVE ATTEMPTED A PRECAUTIONARY LANDING DUE TO AN ACCUMULATION OF AIRFRAME ICE. FLT PRECAUTIONS FOR MODERATE RIME ICE IN CLOUDS AND PRECIPITATION FROM FREEZING LEVEL TO 14,000 FT HAD BEEN FORECAST.

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

SPATIAL DISORIENTATION..PILOT IN COMMAND

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

VISUAL/AURAL PERCEPTION..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:

WEATHER EVALUATION..PERFORMED..PILOT IN COMMAND


Contributing Factors

WING..ICE


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

TERRAIN CONDITION..ICY


Contributing Factors

TERRAIN CONDITION..SNOW COVERED


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

PRECAUTIONARY LANDING..ATTEMPTED..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..OBSCURATION


Contributing Factors

WEATHER CONDITION..SNOW


Contributing Factors

WEATHER CONDITION..WHITEOUT


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS

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