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N713JB accident description

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Crash location Unknown
Nearest city Pioneer, CA
41.292375°N, 122.310289°W
Tail number N713JB
Accident date 30 Jun 1991
Aircraft type Beech 65
Additional details: None

NTSB Probable Cause

IMPROPER EMERGENCY PROCEDURES BY THE PILOT, WHEN HE INADVERTENTLY SHUT DOWN THE LEFT ENGINE AFTER ENCOUNTERING A PARTIAL LOSS OF POWER IN THE RIGHT ENGINE. FACTORS RELATED TO THE ACCIDENT WERE: IMPROPER INSTALLATION OF THE RIGHT ENGINE'S #6 EXHAUST VALVE SEAT BY OTHER MAINTENANCE PERSONNEL, FATIGUE FAILURE OF THE #6 EXHAUST VALVE, AND THE PILOT'S LACK OF FAMILIARITY WITH THE AIRCRAFT.

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