Primary finding
Probable cause
The failure of the wing spar when the design limits of the airplane was exceeded by the pilot. Contributing to the accident was an inadequate airframe design and an abrupt movement of the flight controls by the pilot.
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NTSB investigation record
LAX91LA375
CompletedBeierle Thunder gull j· UNREG
- Date
- August 24, 1991
- Location
- Santa Margarita, CA
- Conditions
- VMC
- Record
- Completed
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