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CCD sensors have a cover slip of thin glass over the front of them (it is optional to not have this cover slip with FLI cameras). Then there is the CCD chamber glass itself.
Your photo to me looks like the cover slip over the top of the CCD chip.
I suspect if the chip itself was cracked you would not get any image at all. I doubt the camera can readout a sensor which has a crack in it.
From what I have read chips are quite tough. But the cover slip is likely to be thin.
I would send it off. The worst case scenario is you get a quote you are not willing to proceed with and you pay for some shipping.
I think its a fairly safe bet.I have never heard of a cracked CCD sensor since I've been doing astrophotography.
Greg.
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