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Which of the following would NOT shorten an aircraft's fatigue life?

  • A.Regular operation in low-level turbulence
  • B.Repeated heavy landings
  • C.Operating consistently in smooth air at high altitude
  • D.Frequent short flights with many pressurisation cycles

Answer: C

Smooth high-altitude cruise accumulates damage slowly, since the gust content is low and the flights are long, so each pressurisation cycle covers more hours. The other three all raise the rate at which damage is accumulated.

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