NTSB Identification: ANC91GA087.
The docket is stored on NTSB microfiche number 44157.
Accident occurred Wednesday, July 03, 1991 in KING SALMON, AK
Probable Cause Approval Date: 03/24/1993
Aircraft: PIPER PA-18, registration: N82732
Injuries: 1 Uninjured.

: 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 public aircraft accident report.

THE PILOT STATED THAT WHILE ADJUSTING THE POWER APPROACH, HIS HEAVY POLICE COAT SLEEVE SWITCHED THE MAGNETO SWITCH TO OFF, WHICH CAUSED A COMPLETE ENGINE FAILURE. AFTER TOUCHDOWN ON A GRAVEL BAR, THE AIRPLANE NOSED OVER ON ITS BACK.

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

THE PILOT INADVERTENTLY SWITCHED THE MAGNETOS OFF DURING THE FLIGHT. CONTRIBUTING TO THE ACCIDENT WAS THE ROUGH, UNEVEN TERRAIN WITH LOOSE GRAVEL.

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