Accident
Last updated: 21 October 2014
Statuts:Enquête Officielle
Date:vendredi 24 février 1989
Type/Sous-type:Boeing 747-122
Compagnie:United Air Lines
Immatriculation: N4713U
Numéro de série: 19875/89
Année de Fabrication: 1970-10-20 (18 years 4 months)
Heures de vol:58814
Cycles:15027
Equipage:victimes: 0 / à bord: 18
Passagers:victimes: 9 / à bord: 337
Total:victimes: 9 / à bord: 355
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Pacific Ocean (   Océan Pacifique) show on map
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Intern.
Aéroport de départ:Honolulu International Airport, HI (HNL/PHNL), Etats-Unis d'Amérique
Aéroport de destination:Auckland International Airport (AKL/NZAA), Nouvelle-Zélande
Numéro de vol: 811
Détails:
United Airlines flight 811 experienced an explosive decompression as it was climbing between 22,000 and 23,000 feet after taking off from Honolulu, Hawaii, en route to Auckland and Sydney. The airplane made a successful emergency landing at Honolulu and the occupants evacuated the airplane. Examination of the airplane revealed that the forward lower lobe cargo door had separated in flight and had caused extensive damage to the fuselage and cabin structure adjacent to the door. Nine of the passengers had been ejected from the airplane and lost at sea.

PROBABLE CAUSE: "The sudden opening of the forward lower lobe cargo door in flight and the subsequent explosive decompression. The door opening was attributed to a faulty switch or wiring in the door control system which permitted electrical actuation of the door latches toward the unlatched position after initial door closure and before takeoff. Contributing to the cause of the accident was a deficiency in the design of the cargo door locking mechanisms, which made them susceptible to deformation, allowing the door to become unlatched after being properly latched and locked. Also contributing to the accident was a lack of timely corrective actions by Boeing and the FAA following a 1987 cargo door opening incident on a Pan Am B-747."

Sources:
» NTSB/AAR-92/02
» CVR transcript United Air Lines Flight 811 (Neil Krey's CRM Developers Forum)


Opérations de secours

NTSB issued 17 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of Boeing 747-122 N4713U
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Honolulu International Airport, HI et Auckland International Airport est de 7046 km (4404 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 tels qui sont connus à ce jour.
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