NTSB Identification: SEA85LA178.
The docket is stored on NTSB microfiche number 28434.
Accident occurred Tuesday, June 11, 1985 in IDAHO CITY, ID
Aircraft: BELL 47G-3B-1, registration: N1333X
Injuries: 1 Uninjured.

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

WHILE THE STUDENT PLT WAS ON A X-COUNTRY FLT, THE ENG LOST POWER AFTER THE SUPERCHARGER FAILED. THE PLT STATED THAT HE WAS UNABLE TO MAINTAIN ALTITUDE & RPM; HE SUBSEQUENTLY MADE A FORCED LANDING IN A HEAVILY TIMBERED, MOUNTAINOUS AREA.

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

EXHAUST SYSTEM,EXTERNAL SUPERCHARGER..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

OBJECT..TREE(S)

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