NTSB Identification: NYC85LA005.
The docket is stored on NTSB microfiche number 26739.
Nonscheduled 14 CFR
Accident occurred Sunday, October 07, 1984 in MOULTONBORO, NH
Aircraft: BELL 47G3-B1, registration: N401GC
Injuries: 3 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.

ACFT WAS CLIMBING THROUGH A MOUNTAIN SADDLE WHEN THE ENGINE BEGAN TO BACKFIRE AND LOSE POWER. PLT ENTERED AUTOROTATION & SETTLED INTO TREES ON AUTOROTATIVE FLARE. ENGINE INSPECTION REVEALED #3 CYLINDER INTAKE VALVE SPRINGS BROKEN.

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

ENGINE ASSEMBLY,VALVE,INTAKE..DISABLED



Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..HIGH VEGETATION


Contributing Factors

OBJECT..TREE(S)

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