United Airlines Flight 811

971 Words2 Pages

On February 24, 1989, United Airlines flight 811 was en route to Sydney, Australia from Honolulu, Hawaii. They later experienced decompression due to the cargo door failure in front aft during flight. Flight 811 made successful emergency landing at Honolulu with nine passengers missing out of 337 passenger aboard. The cargo door that was ejected on Flight 811 damaged engines 3 and 4, which led to crew to turn back to Honolulu.
According the National Transportation Safety Board (NTSB) Aircraft Accident Report, determines that the probable cause of the Flight 811 was sudden opening of the forward lower lobe cargo door in flight and subsequent explosive decompression, (NTSB,1989). In figure 1, depicted the damage of Flight 811 when it landed.

Figure 1 of Flight 811

Source: National Transportation Safety Board
Furthermore, investigators discovered that faulty switch attributed electrical actuation for the door to open. This means that the cargo door had a design flawed, which allow the door open during flight. Despite the nine fatalities, United Airlines flight 811 had landed Honolulu with 328 passengers. With that in mind, the survivals of Flight 811 was grateful for the flight crew landed safely with their cripple plane.
In regards to cargo door, on October 26, 1990 the U.S Navy recovered the cargo doors from the Pacific Ocean floors. In fact, after the NTSB examining the door, they discovered the latch cams had been back-driven from the closed position. This means that latch cam did not fully closed and locked properly when the cargo door was closed. In figure 2, illustrated the mechanical procedure of latch cam locking into position.
Figure 2 Latch cam system

Source: National Transportation Safety Board
If the FAA had ad...

... middle of paper ...

...y damage, the flight crews were able to land their crippled plane safely. In this case, the Flight 811 did not crash due to malfunction of the cargo door such as, Turkish Airlines Flight 981. Therefore, flight 811 will consider as a crash survivability.
Moreover, after the investigation was conducted, the NTSB had issued safety recommendations for the FAA to consider. The FAA had considered some of NTSB safety recommendations, for example, improving the mechanical procedure of locking and stronger latches for oversized cargo doors. One can agree that survivals of Flight 811 would remember that day.

Works Cited

National Transportation Safety Board, (1989, February 28). Aircraft Accident Report. Explosive Decompression-Loss of Cargo Door in Flight. Retrieved from http://www.ntsb.org/Wiringcargodoorlite/Additional%20Aircraft%20Accident%20Reports_files/AAR92-3.pdf

More about United Airlines Flight 811

Open Document