ASN Wikibase Occurrence # 329516
| Date: | Wednesday 15 October 1975 |
| Time: | |
| Type: |  Grumman TC-4C (G-159 Gulfstream I) |
| Owner/operator: | United States Marine Corps |
| Registration: | 155723 |
| MSN: | 178 |
| Year of manufacture: | 1967 |
| Fatalities: | Fatalities: 9 / Occupants: 9 |
| Aircraft damage: | Destroyed, written off |
| Category: | Accident |
| Location: | Cherry Point MCAS, NC (NKT) -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Military |
| Departure airport: | Cherry Point MCAS, NC (KNKT) |
| Cherry Point MCAS, NC (KNKT) |
Shortly after lift off, a low torque sensing switch failed precipitating 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.
All on board, four crew men, four students and one instructor, were killed.
Sources:
The Times-News - Oct 16, 1975
William L. Hall
Location
Revision history:
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