How does an A&P know if he can simply straighten out a longeron or if
he's going to have to cut and splice? Obviously if it has a kink in
it, it's very weak and would have to be spliced. Is there a reference?

In the meanwhile I'll go read AC43.13 and see what they say.
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Well, 43.13 doesn't say when to bend or when to cut, so, the question
stands.

- Mike