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Accident
Last updated: 15 December 2017
Estado:Final
Fecha:viernes 24 febrero 1989
Tipo:Silhouette image of generic B741 model; specific model in this crash may look slightly different
Boeing 747-122
Operador:United Airlines
Registración: N4713U
Numéro de série: 19875/89
Año de Construcción: 1970-10-20 (18 years 4 months)
Horas Totales de la Célula:58814
Ciclos:15027
Motores: 4 Pratt & Whitney JT9D-7A
Tripulación:Fatalidades: 0 / Ocupantes: 18
Pasajeros:Fatalidades: 9 / Ocupantes: 337
Total:Fatalidades: 9 / Ocupantes: 355
Daños en la Aeronave: Considerable
Consecuencias: Repaired
Ubicación:cerca Hawaii (   Océano Pacífico)
Fase: En ruta (ENR)
Naturaleza:Vuelo Internacional Programado
Aeropuerto de Salida:Honolulu International Airport, HI (HNL/PHNL), Estados Unidos de América
Aeropuerto de Llegada:Auckland International Airport (AKL/NZAA), Nueva Zelanda
Número de Vuelo:UA811
Descripción:
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:

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."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 3 years
Accident number: NTSB/AAR-92/02
Download report: Final report

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


Subsiguiente / acciones de seguridad

NTSB issued 17 Safety Recommendations

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Fotos

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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 Honolulu International Airport, HI to Auckland International Airport as the crow flies is 7046 km (4404 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.

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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