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Discussion

The de Havilland Comet accidents of 1954 were ultimately attributed to

  • A.Control system malfunction
  • B.Wing flutter
  • C.Pressurisation fatigue at a cut-out corner
  • D.Engine failure

Answer: C

Repeated pressurisation cycles initiated cracks at cut-out corners, and the investigation included a full-scale fuselage tested in a water tank. It established pressurisation fatigue as a first-order design consideration and reshaped how transport fuselages are certified.

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