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A short-haul aircraft reaches its pressurisation cycle limit sooner than a long-haul one because

  • A.Its cabin pressure differential is higher
  • B.Its fuselage is thinner
  • C.It flies at a higher altitude
  • D.It flies many more, shorter flights

Answer: D

Fuselage fatigue is driven by cycles rather than hours, and a regional aircraft may fly six or eight sectors a day against a long-haul aircraft's one. Life limits for such airframes are therefore quoted in cycles, and a fleet's utilisation pattern determines which limit is reached first.

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