NTSB Identification: SEA85FA142.
The docket is stored on NTSB microfiche number 28635.
Nonscheduled 14 CFR
Accident occurred Tuesday, June 18, 1985 in GIBBONSVILLE, ID
Aircraft: MAULE M-6-235, registration: N121A
Injuries: 3 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.

THE PLT AND TWO PASSENGERS DEPARTED ON A 2 HR FLT FOR THE PURPOSE OF CONDUCTING AERIAL OBSERVATION OF MINE SITES. THE ACFT WAS OPERATING IN MOUNTAINOUS TERRAIN DURING HOT TEMP CONDITIONS RESULTING IN A HIGH DENSITY ALT. THERE WERE NO WITNESSES TO THE ACCIDENT. THE ACFT DESCENDED TO AND IMPACTED THE GROUND IN A NEAR VERITCAL ATTITUDE INDICATIVE OF THE INITAL PHASE OF A STALL. THERE WAS NO EVIDENCE OF ANY AIRFRAME NOR POWERPLANT MALFUNCTION. THE PLT HAD BEEN OPERATING THE ACCIDENT ACFT IN THE GEOGRAPHIC AND ENVIRONMENTAL CONDITIONS NEAR THE ACCIDENT SITE FOR THE PREVIOUS YEAR.

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

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND

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

STALL..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

WEATHER CONDITION..RISING


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE

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