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Accident description
Last updated: 28 July 2016
Status:Final
Date:Monday 24 June 1974
Time:16:45
Type:Silhouette image of generic GLF2 model; specific model in this crash may look slightly different
Grumman G-1159 Gulfstream II
Operator:IBM
Registration: N720Q
C/n / msn: 58
First flight: 1969
Total airframe hrs:3224
Engines: 2 Rolls-Royce Spey 511-8
Crew:Fatalities: 3 / Occupants: 3
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 3 / Occupants: 3
Airplane damage: Damaged beyond repair
Location:Kline, SC (   United States of America)
Phase: En route (ENR)
Nature:Training
Departure airport:Savannah International Airport, GA (SAV/KSAV), United States of America
Destination airport:Savannah International Airport, GA (SAV/KSAV), United States of America
Narrative:
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 360deg 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."

Classification:

Loss of control

Sources:
» NTSB


Follow-up / safety actions

NTSB issued 1 Safety Recommendation

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