1993-09-11: Cessna 180 — Sixty-thirty North

1993-09-11: Cessna 180 — Sixty-thirty North — Cooper Landing, AK

Casualties unknown • Cooper Landing, AK, US

Probable cause

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.

— NTSB Determination

Accident narrative

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.

Frequently asked questions

What happened in the 1993-09-11 Cessna 180 accident near Cooper Landing, AK?

What aircraft was involved and where did it happen?

The accident on 1993-09-11 involved a Cessna 180, registration N7541K, operated by Sixty-thirty North, at Cooper Landing, AK.

What was the probable cause of the accident?

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.

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