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Which statement about widespread fatigue damage is TRUE?

  • A.Many small cracks may link up
  • B.It refers to a single large crack
  • C.It only affects new aircraft
  • D.It is prevented by fail-safe design

Answer: A

As details of the same design reach similar ages they crack together, and the ligaments between them can fail progressively. This is precisely what fail-safe design does not anticipate, and it is central to ageing aircraft programmes.

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