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Metal Fatigue

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Metal Fatigue
On January 10th, 1954 a BOAC de Havilland DH-106 Comet 1(Flight 781) crashed on final approach about 10 miles away from London. The plane was en route from Roma - Ciampino Airport in Italy to London - Heathrow Airport in the United Kingdom. The aircraft was completely destroyed after crashing off the islands of Elba killing six crew members and 29 passengers on board the aircraft. When investigator arrived at the scene of the crash they noticed signs of in flight breakup due to carpet of the plane were found near the tail section of the plane. After gathering all of the wreckage from the crash investigators found evidence that tear and wears started on the roof of the aircraft while on approach. After a tear in the aircraft the plane basically just tore apart while it was still in air. After noticing all the in flight tear investigators begin to test for metal fatigue on another airplane that BOAC donated. After conducting the test they concluded their investigation by stating the crashed was cause my metal fatigue. After many repeated cycle of pressurization and de-pressurization of the aircraft cabin the cabin began to worn down and break apart.

Metal Fatigue:
Metal Fatigue is define as the material on an airplane begin to wore out after all the cycle of pressurization and depressurization it has to go through during flight. An example would be a paper clip that have been straighten out. If you continuously bend the paperclip back and forth eventually the paper clip would snap in half.

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