NTSB Identification: DEN87FA234.
The docket is stored on NTSB microfiche number 34681.
Accident occurred Tuesday, September 08, 1987 in ANACONDA, MT
Probable Cause Approval Date: 11/29/1988
Aircraft: PIPER PA-12-150, registration: N7695H
Injuries: 2 Fatal.

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.

BOTH PLTS WERE REPORTEDLY AVID BIG HORN SHEEP HUNTERS. ON THE MORNING OF THE ACCIDENT, THE 2ND PLT PICKED UP TOPOGRAPHICAL CHARTS OF THE AREA WHERE THE ACFT CRASHED. IT WAS AN AREA WHERE THE MONTANA DEPARTMENT OF FISH, WILDLIFE, AND PARKS (FWP) HAD RECENTLY RELOCATED A HERD OF BIG HORN SHEEP. THE 2ND PLT WAS ALSO A RECENTLY RETIRED FWP REGIONAL SUPERVISOR WHO HAD BEEN IN CHARGE OF SHEEP HERD RELOCATIONS. ONE WITNESS SAW THE ACFT FLYING EAST ACROSS THE MTNS AT LOW ALT. IT SUDDENLY DROPPED OUT OF SIGHT AND SMOKE WAS SEEN COMING FROM THE AREA. WINDS ALOFT WERE FORCAST TO BE OUT OF THE NNW AT 14-15 KTS. NO EVIDENCE WAS FD TO INDICATE ANY PRE-IMPACT FAILURE OR MALFUNCTION. THE ACFT STRUCK THE EAST WALL OF 7300 FT HIGH BUND GULCH AT ABT THE 7250 FT LEVEL IN A NOSE HIGH, L WG LOW ATTITUDE. THE CARB THROTTLE VALVE WAS FULL OPEN. THE PROP BORE EVIDENCE OF ROTATION AT IMPACT.

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

LOW PASS..INTENTIONAL..PILOT IN COMMAND

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

DIVERTED ATTENTION..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..RAVINE


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..DOWNDRAFT

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