The report explains the midair collision involving a Lycoming Air Services Piper Aerostar PA-60 and a Sun Company Aviation Department Bell 412. The National Transportation Safety Board determines that the probable causes of the accident were the poor judgment by the captain of the airplane to permit the in-flight inspection after he had determined to the best of his ability that the nose landing gear was fully extended, the poor judgment of the captain of the helicopter to conduct the inspection, and the failure of the flightcrew of the helicopter to maintain safe separation. Contributing to the accident was the incomplete training and checking that the flightcrew of N3645D received from Lycoming Air Services, Inc., and the FAA principal operations inspector assigned to the operator.


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    Title :

    Aircraft Accident/Incident Summary Report - Midair Collision Involving Lycoming Air Services Piper Aerostar PA-60 and Sun Company Aviation Department Bell 412, Merion, Pennsylvania, April 4, 1991


    Publication date :

    1991


    Size :

    28 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English