Discussion
Assertion (A): Tear straps are fitted to a pressurised fuselage skin.
Reason (R): They arrest a running crack so that decompression is controlled rather than catastrophic.
Select the correct answer from the options below.
Answer: A
Both are true and the second is the reason for the first. Without them a crack driven by hoop stress can run many frames in an instant. With them the damage is confined to a bay, which is the practical expression of damage tolerance.
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