Accident Grumman G-1159 Gulfstream II N720Q,
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Date:Monday 24 June 1974
Type:Silhouette image of generic GLF2 model; specific model in this crash may look slightly different    
Grumman G-1159 Gulfstream II
Registration: N720Q
MSN: 58
Year of manufacture:1969
Total airframe hrs:3224 hours
Engine model:Rolls-Royce Spey 511-8
Fatalities:Fatalities: 3 / Occupants: 3
Aircraft damage: Destroyed, written off
Location:near Kline, SC -   United States of America
Phase: Take off
Departure airport:Savannah International Airport, GA (SAV/KSAV)
Destination airport:Savannah International Airport, GA (SAV/KSAV)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
An electrical short circuit caused an unwanted extension of the ground and flight spoilers during a training flight. Control was lost; the aircraft made several 360 degree rolls and then dove into a swampy area.

PROBABLE CAUSE: "An unwanted extension of the ground and flight spoilers, which resulted in a loss of control at an altitude from which recovery could not be made. The ground spoilers probably deployed because of a hot electrical short in the spoiler extend circuitry. Whereas the spoilers probably deployed symetrically, the left ground spoiler actuator failed in flight and caused a loss of lateral control. The subsequent logs of pitch control was caused by the full nosedown elevator trim tab position and the high aircraft speed."

Accident investigation:
Investigating agency: NTSB
Report number: DCA74AZ022
Status: Investigation completed
Duration: 1 year
Download report: Final report




Revision history:


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