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Accident
Last updated: 23 October 2017
Statuts:Enquête Officielle
Date:jeudi 13 novembre 1986
Heure:12:25
Type/Sous-type:Silhouette image of generic L101 model; specific model in this crash may look slightly different
Lockheed L-1011 TriStar 1
Compagnie:Delta Air Lines
Immatriculation: N714DA
Numéro de série: 1090
Année de Fabrication: 1974
Equipage:victimes: 0 / à bord: 23
Passagers:victimes: 0 / à bord: 114
Total:victimes: 0 / à bord: 137
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Newark International Airport, NJ (EWR) (   Etats-Unis d'Amérique)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Nat.
Aéroport de départ:Atlanta-William B. Hartsfield International Airport, GA (ATL/KATL), Etats-Unis d'Amérique
Aéroport de destination:Newark International Airport, NJ (EWR/KEWR), Etats-Unis d'Amérique
Numéro de vol:DL194
Détails:
The rear main spar of the right wing failed as Delta flight 194 touched down on runway 29 at Newark Airport. The pilots stated that there was moderate turbulence on final approach and initial touchdown was on the right main gear first. The touchdown was firm but not hard which was confirmed from the 1.4g recorded on the DFDR. The 1.4g force is well within the landing gear certification limits.
The spar web failure was caused by a fatigue crack that originated at a 'hi-loc' fastener hole located at the lower inboard corner of a doubler that surrounds the fuel filler valve which is mounted vertically on the spar web. The fatigue zone in the spar web had progressed about 6 3/4 inches before the web failed as the airplane touched down. The fracture in the spar web extended diagonally downward and outboard at 45 degrees from inboard wing station 241.0 to inboard station 293.5. The flight crew did not report any airplane malfunction during the flight.

Probable Cause:

PROBABLE CAUSE:
wing..fatigue
acft/equip,inadequate design..manufacturer

Sources:
» NTSB


Opérations de secours

NTSB issued 3 Safety Recommendations

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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 Atlanta-William B. Hartsfield International Airport, GA et Newark International Airport, NJ est de 1191 km (744 miles).

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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