NTSB Identification: SEA86LA107.
The docket is stored on NTSB microfiche number 30626.
Accident occurred Sunday, April 20, 1986 in BONNERS FERRY, ID
Aircraft: CESSNA 172, registration: N70040
Injuries: 2 Serious,2 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 UTILIZED UPDRAFTS TO CLIMB TO 7800 FT TO CLEAR A MOUNTAIN RIDGE WHICH WAS COVERED WITH 'CAP CLOUDS'. ON THE LEE SIDE OF THE RIDGE A DOWNDRAFT WAS EXPERIENCED AND THE ACFT DESCENDED INTO THE 'FOG'. THE PLT REPORTED THE ACFT INSTRUMENTS WERE USED TO MAINTAIN A NOSE UP ATTITUDE BUT THE ACFT CONTINUED DESCENDING TO GROUND IMPACT.

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

WEATHER EVALUATION..INADEQUATE..PILOT IN COMMAND

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

CLEARANCE..MISJUDGED..PILOT IN COMMAND

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

VFR FLIGHT INTO IMC..INADVERTENT..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..MOUNTAIN WAVE


Contributing Factors

WEATHER CONDITION..CLOUDS

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