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Probable Cause
The Board determines the probable cause of this accident was the inflight reversal of the No. 3 propeller due to a propeller power unit malfunction resulting from improper maintenance practices and inspection procedures.
Recommendation
The Board submitted recommendations to the Administrator during the investigation of this accident. These recommendations directly related to the cause of this accident are set out in attachments A and B.
BY THE CIVIL AERONAUTICS BOARD.
/s/ ALAN S. BOYD
Chairman
/s/ ROBERT T. MURPHY
Vice Chairman
/s/ CHAN GURNEY
Member
/s/ G. JOSEPH MINETTI
Member
/s/ WHITNEY GILLILLAND
Member
