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Last updated: 20 September 2021
Statuts:Enquête Officielle
Date:jeudi 30 juillet 1992
Heure:17:41
Type/Sous-type:Silhouette image of generic L101 model; specific model in this crash may look slightly different
Lockheed L-1011 TriStar 1
Compagnie:Trans World Airlines - TWA
Immatriculation: N11002
Numéro de série: 1014
Année de Fabrication: 1972
Heures de vol:49662
Cycles:19659
Moteurs: 3 Rolls-Royce RB211-22B
Equipage:victimes: 0 / à bord: 12
Passagers:victimes: 0 / à bord: 280
Total:victimes: 0 / à bord: 292
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:New York-John F. Kennedy International Airport, NY (JFK) (   Etats-Unis d'Amérique)
Élévation des lieux de l'accident: 4 m (13 feet) amsl
Phase de vol: Au décollage (TOF)
Nature:Transport de Passagers Nat.
Aéroport de départ:New York-John F. Kennedy International Airport, NY (JFK/KJFK), Etats-Unis d'Amérique
Aéroport de destination:San Francisco International Airport, CA (SFO/KSFO), Etats-Unis d'Amérique
Numéro de vol:TW843
Détails:
Flight 843 to San Francisco was cleared to push back from the gat at 17:16 and was cleared to taxi to runway 13R at 17:25. Takeoff was commenced at 17:40. The VR speed was reached at 17:41:03 and the aircraft lifted off the runway. At that moment the stick shaker activated and the first officer, who was making the takeoff, sensed a loss of performance. The captain than took over control and decided to abort the takeoff. The TriStar touched down again (at a vertical descent rate of 14 feet/sec - the structural design limit being 6 feet/sec -) after being airborne for about 6 seconds. Maximum braking and reverse thrust were applied but the airplane didn't decelerate as expected. When it became apparent that he would not be able to stop before hitting the blast fence at the end of the runway, the captain turned the plane left off the runway onto a field. The TriStar came to rest 296 feet to the left of the runway and caught fire.
It appeared that the right Angle of Attack (AOA) sensor had experienced 9 previous malfunctions. The intermittent malfunction was not detectable during pre-flight system tests by the pilots and didn't trigger a fault light. This permitted the sensor to cause a false warning when the air-ground sensor on the landing gear went into the air status on takeoff.

Probable Cause:

PROBABLE CAUSE: "Design deficiencies in the stall warning system that permitted a defect to go undetected, the failure of TWA's maintenance system and inadequate crew coordination between the captain and first officer that resulted in their inappropriate response to a false stall warning."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 244 days (8 months)
Accident number: NTSB/AAR-93-04
Download report: Final report

Sources:
» FSAT 94-08
» ICAO Adrep Summary 1/95
» NTSB/AAR-93/04


Opérations de secours

NTSB issued 10 Safety Recommendations

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Photos

photo of Lockheed-L-1011-TriStar-1-N11002
accident date: 30-07-1992
type: Lockheed L-1011 TriStar 1
registration: N11002
photo of Lockheed-L-1011-TriStar-1-N11002
accident date: 30-07-1992
type: Lockheed L-1011 TriStar 1
registration: N11002
photo of Lockheed-L-1011-TriStar-1-N11002
accident date: 30-07-1992
type: Lockheed L-1011 TriStar 1
registration: N11002
photo of Lockheed-L-1011-TriStar-1-N11002
accident date: 30-07-1992
type: Lockheed L-1011 TriStar 1
registration: N11002
photo of Lockheed-L-1011-TriStar-1-N11002
accident date: 30-07-1992
type: Lockheed L-1011 TriStar 1
registration: N11002
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre New York-John F. Kennedy International Airport, NY et San Francisco International Airport, CA est de 4123 km (2577 miles).
Accident location: Exact; as reported in the official accident report.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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