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Last updated: 25 October 2016
Datum:Freitag 24 Februar 1989
Flugzeugtyp:Silhouette image of generic B741 model; specific model in this crash may look slightly different
Boeing 747-122
Fluggesellschaft:United Air Lines
Kennzeichen: N4713U
Werknummer: 19875/89
Baujahr: 1970-10-20 (18 years 4 months)
Anzahl Zyklen der Zelle:15027
Triebwerk: 4 Pratt & Whitney JT9D-7A
Besatzung:Todesopfer: 0 / Insassen: 18
Fluggäste:Todesopfer: 9 / Insassen: 337
Gesamt:Todesopfer: 9 / Insassen: 355
Sachschaden: schwer beschädigt
Konsequenzen: Repaired
Unfallort:nahe Hawaii (   Pacific Ocean)
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
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."

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

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-92/02
report released:18 March 1992
duration of investigation: 3 years
download report: NTSB/AAR-92/02


NTSB issued 17 Safety Recommendations

Show all AD's and Safety Recommendations


photo of Boeing 747-122 N4713U
photo of Boeing 747-122 N4713U
photo of Boeing 747-122 N4713U
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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).

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