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Accident
Last updated: 17 October 2017
Status:Schlussbericht
Datum:Freitag 4 April 1986
Zeit:19:22
Flugzeugtyp:Silhouette image of generic WW24 model; specific model in this crash may look slightly different
IAI 1124A Westwind II
Betrieben durch:Integerresources Inc. & Drayton Ass.
Gemietet von :Drayton Associates
Kennzeichen: N50SK
Werknummer: 309
Baujahr: 1980
Betriebsstunden:2745
Triebwerk: 2 Garrett TFE731-3-1G
Besatzung:Todesopfer: 2 / Insassen: 2
Fluggäste:Todesopfer: 5 / Insassen: 5
Gesamt:Todesopfer: 7 / Insassen: 7
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Redwater, TX (   USA)
Flugphase: Während des Fluges (ENR)
Betriebsart:Geschäftsflug
Flug von:Dallas-Redbird Airport, TX (RBD/KRBD), USA
Flug nach:Teterboro Airport, NJ (TEB/KTEB), USA
Unfallbericht:
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:

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:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 10 months
Accident number: FTW86MA058
Download report: Summary report

Informationsquelle:
» NTSB


Sicherheitsempfehlungen

NTSB issued 4 Safety Recommendations

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Dallas-Redbird Airport, TX to Teterboro Airport, NJ as the crow flies is 2202 km (1376 miles).
Accident location: Exact; deduced from official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s 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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IAI 1124

  • 442 built
  • 4th loss
  • 2nd Fataler Unfall
  • The worst accident
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