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A structural door over a wing cut-out is described as load-carrying when it

  • A.Carries cabin pressure alone
  • B.It restores the shear path when latched
  • C.Merely keeps the weather out
  • D.Reduces the aircraft's drag only

Answer: B

Latching the door into the surrounding structure lets shear pass through it, restoring most of the torsional continuity the cut-out removed. The alternative is to carry the load entirely in the frame around the opening, which is considerably heavier.

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