lost due to the loss of the electric supply to the flight data recorder and the voice recorder
was snapped in just 6 minutes before the crash.
There was no criminal activity that was undertaken by the crew that was onboard. The
flammable insulation had caught fire due to the fault in the wiring system. This had led to the
failure of the key electrical systems that were present inside the aircraft. The investigation
revealed the fact that the installation of the new entertainment system within the aircraft might
have led to the spreading of the fire. The investigation report further revealed the absence of the
mechanism for the fire detection just above the cockpit. This barred the crew from realizing that
the fire had spread in the frontal part of the jet which was flying at a high speed of 7 nautical
miles per minute. The key electrical systems had begun to fail and shutdown in a very fast
succession after the detection of the foul smell in the cockpit for about a span of 13 minutes.
Fault Tree Analysis
The Fault Tree Analysis is generally used to deal with the revelation of the cause of the
failure of the control systems that have been present within the aircraft. The analysis attempts to
discuss the various factors that had been a reason for the development of the issues that are
responsible for the development of the disaster situation. The analysis is majorly dependent on
the deductive approaches towards the top-down understanding of the incident. The analysis
considers the various minor events that could result in a huge disaster. The concerned incident
had been caused due to the flawed wiring, the absence of the fire detection, the cloudy weather,
the use of the flammable substances as a part of the entertainment system which was present
within the organization. The absence of the proper fire detection system had resulted in the
conditions wherein the pilots could not take proper action due to the non-detection of the fire
within the aircraft.

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Swissair Flight 111 Crash

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