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Match each load case in List I with the structure it typically sizes in List II.

List I

A. 2.5 g manoeuvre at high weight

B. Cabin pressurisation

C. Landing impact

D. Fin side load in a rudder reversal

List II

1. The fuselage shell and its fatigue life

2. The wing spar caps and skins

3. The rear fuselage and fin attachment

4. The undercarriage and its attachment structure

Select the correct match.

  • A.A-1, B-2, C-4, D-3
  • B.A-2, B-4, C-1, D-3
  • C.A-3, B-1, C-4, D-2
  • D.A-2, B-1, C-4, D-3

Answer: D

Different parts of an airframe are sized by quite different cases, which is why load analysis produces a family of conditions rather than a single worst case. A structure critical in one case may have ample margin in every other.

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