NTSB Identification: ANC93FA173.
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Nonscheduled 14 CFR
Accident occurred Saturday, September 11, 1993 in COOPER LANDING, AK
Probable Cause Approval Date: 12/02/1994
Aircraft: CESSNA 180, registration: N7541K
Injuries: 3 Serious,1 Minor.

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 PILOT REDUCED POWER BY RETARDING THE THROTTLE. THE ENGINE RESPONDED AND CONTINUED TO LOSE POWER. THE PILOT APPLIED THROTTLE AND THE ENGINE DID NOT RESPOND. HE ATTEMPTED TO LAND ON RUNWAY 03 BUT WAS UNABLE TO REDUCE POWER AND OVER SHOT THE RUNWAY. HE WAS TURNING TO REVERSE COURSE AND LAND ON RUNWAY 21. DURING THE TURN THE ENGINE BEGAN TO LOSE MORE POWER AND AIRPLANE DESCENDED AND CRASHED INTO TREES. EXAMINATION OF AIRPLANE SHOWED THAT THE THROTTLE ARM WAS NOT SAFETIED TO THE CARBURETOR THROTTLE STOP IAW THE AIRWORTHINESS DIRECTIVE AND HAD SEPARATED FROM THE CARBURETOR.

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

THE SEPARATION OF THE THROTTLE ARM FROM THE THORTTLE SHAFT, THE FAILURE OF THE MAINTENANCE PERSONNEL TO COMPLY WITH THE AIRWORTHINESS DIRECTIVE, AND THE COMPANY MANAGEMENT'S FAILURE TO ADEQUATELY ENSURE COMPLIANCE WITH THE AIRWORTHINESS DIRECTIVES.

Full narrative available

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