NTSB Identification: DEN86LA236.
The docket is stored on NTSB microfiche number 31436.
Accident occurred Sunday, August 24, 1986 in HELENA, MT
Aircraft: MAYALA DRAGONFLY, registration: N4478V
Injuries: 2 Serious.

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 ACFT WAS ON FINAL APCH AFTER COMPLETING A X-COUNTRY FROM BILLINGS, MT, WHEN THE ACCIDENT OCCURRED. THE PLT STATED THE ACFT WAS LOW AFTER INTERCEPTING THE VASI SO POWER WAS ADDED; HOWEVER, THE ENG DID NOT RESPOND. THE ACFT STRUCK A SMALL HILL 300 FT SHORT OF RWY. INSPECTION FOUND NO EVIDENCE OF MECHANICAL FAILURE OF THE ENGINE BUT THE UPPER CABLE FROM THROTTLE CONTROL-TO-CARBURETOR LINKAGE WAS BENT AND THE WALKING BEAM SHOWED EVIDENCE OF BINDING. ADDITIONALLY, NO EVIDENCE OF CABLE LUBRICATION WAS NOTED.

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

THROTTLE/POWER LEVER,CABLE..BENT

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

THROTTLE/POWER LEVER,CABLE..BINDING(MECHANICAL)

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

THROTTLE/POWER CONTROL..INITIATED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

PROPER GLIDEPATH..BELOW..PILOT IN COMMAND


Contributing Factors

CARBURETOR HEAT..NOT USED..PILOT IN COMMAND

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