Sagging Roof

Looking at it from the crawl space, it appears that the end of one of the 4x8s near the peak is warped.
Is it possible to repair this by cutting away and replacing just the warped portion?
Or would you recommend a new 4x8?
Or is it necessary to replace *all* the 4x8s on that section of roof?
Comments, please. Thanks.
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On Jun 22, 1:34 pm, Windswept@home (Clueless Homeowner) wrote:

Post a link to some pictures.
R
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