Date: | Friday 4 April 1986 |
Time: | 19:22 |
Type: | IAI 1124A Westwind II |
Owner/operator: | Integerresources Inc. & Drayton Ass. |
Registration: | N50SK |
MSN: | 309 |
Year of manufacture: | 1980 |
Total airframe hrs: | 2745 hours |
Engine model: | Garrett TFE731-3-1G |
Fatalities: | Fatalities: 7 / Occupants: 7 |
Aircraft damage: | Destroyed, written off |
Category: | Accident |
Location: | Redwater, TX -
United States of America
|
Phase: | En route |
Nature: | Executive |
Departure airport: | Dallas-Redbird Airport, TX (RBD/KRBD) |
Destination airport: | Teterboro Airport, NJ (TEB/KTEB) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:Westwind N50SK departed Dallas-Redbird Airport at 18:56 CST under an IFR flightplan bound for Teterboro.
Upset at FL370 as a result of clear air turbulence associated with a VIP level 6 thunderstorm; entered an uncontrolled descent through the cell. Left main landing gear door broke off due to overstress striking the left horizontal stabilizer which separated.
PROBABLE CAUSE:
flight/nav instruments,weather radar system..failure,partial
weather condition..thunderstorm
weather condition..turbulence,clear air
weather condition..gusts
weather condition..downdraft
preflight briefing service..improper..atc personnel(fss)
hazardous weather advisory..not issued..atc personnel(fss)
in-flight weather advisories..not issued..atc personnel(fss)
information unclear..atc personnel(fss)
CONTRIBUTING FACTORS:
operation with known deficiencies in equipment..continued..pilot in command
light condition..dark night
excessive workload (task overload)..pilot in command
excessive workload (task overload)..copilot/second pilot
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | FTW86MA058 |
Status: | Investigation completed |
Duration: | 1 year and 10 months |
Download report: | Final report |
|
Sources:
NTSB
Location
Revision history:
Date/time | Contributor | Updates |
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