6 fatal · BEECH 65 · 1991-06-30 · PIONEER, CA, USA
Event
NTSB number
LAX91FA282
Event ID
20001212X17290
Type
Accident
Date
1991-06-30
Location
PIONEER, CA, USA
Coordinates
38.519603, -120.38092
Injuries
Highest injury
FATL
Fatal
6
Serious
0
Minor
0
Uninjured
0
Total aboard
6
Aircraft
Make
BEECH
Model
65
Registration
N713JB
FAR Part
091
Engines
2
Damage
DEST
Conditions
Light
DAYL
Weather
VMC
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.