Primary finding
Probable cause
The unlatching and subsequent opening inflight of the left-rear engine cowl door. A factor contributing to the accident was the failure of company maintenance personnel to execute the manufacturer's service bulletin.
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NTSB investigation record
SEA92LA029
CompletedAerospatiale As355F1· N101UC
- Date
- October 29, 1991
- Location
- Billings, MT
- Conditions
- VMC
- Record
- Completed
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