Accident
Last updated: 21 April 2014
Status:Schlussbericht
Datum:Freitag 24 Februar 1989
Flugzeugtyp:Boeing 747-122
Fluggesellschaft:United Air Lines
Kennzeichen: N4713U
Werknummer: 19875/89
Baujahr: 1970-10-20 (18 years 4 months)
Betriebsstunden:58814
Anzahl Zyklen der Zelle:15027
Besatzung:Todesopfer: 0 / Insassen: 18
Fluggäste:Todesopfer: 9 / Insassen: 337
Gesamt:Todesopfer: 9 / Insassen: 355
Sachschaden: schwer beschädigt
Konsequenzen: Repaired
Unfallort:Pacific Ocean (   Pacific Ocean) show on map
Flugphase: Während des Fluges (ENR)
Betriebsart:Internationaler Linienflug
Flug von:Honolulu International Airport, HI (HNL/PHNL), USA
Flug nach:Auckland International Airport (AKL/NZAA), Neuseeland
Flugnummer: 811
Unfallbericht:
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."

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


Sicherheitsempfehlungen

NTSB issued 17 Safety Recommendations

Show all AD's and Safety Recommendations

Fotos

photo of Boeing 747-122 N4713U
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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).

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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