Accident
Last updated: 23 April 2014
Status:
Datum:donderdag 16 oktober 1975
Type:Grumman TC-4C (G-159 Gulfstream I)
Luchtvaartmaatschappij:United States Marine Corps
Registratie: 155723
Constructienummer: 178
Bouwjaar: 1967
Bemanning:slachtoffers: / inzittenden:
Passagiers:slachtoffers: / inzittenden:
Totaal:slachtoffers: 9 / inzittenden: 9
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Cherry Point MCAS, NC (NKT) (   Verenigde Staten) show on map
Fase: InitiŰle klim (ICL)
Soort vlucht:Militair
Vliegveld van vertrek:Cherry Point MCAS, NC (NKT), Verenigde Staten
Vliegveld van aankomst:?
Beschrijving:
Shortly after lift off, a low torque sensing switch failed precipatating an auto feather of an engine. The crew mis-handled the required feathering procedure, allowing the propeller to unfeather and windmill. Subsequently, the crew retracted the flaps. This disabled a spring tab on the rudder which was designed to give additional rudder authority for high power/low airspeed situations. The result of the windmilling propeller and the loss in rudder authority was that V(mca) increased from 101 kts to 138 kts. The airplane rolled inverted and crashed. Witness marks on the operating engine's propeller reportedly indicated that the airplane's speed when it crashed was less than 90 kts.

Bronnen:
» William L. Hall


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This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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