Yeah, the keel looks like there is something very wrong with it--I can't say what that was exactly, I'm not sure, but it really should not look like that. Her weight looks good, not skinny as the previous commenter said. Ovaries look fine as well. I'm not sure what it is that killed her, though it could have been whatever caused the keel deformity perhaps?
Sorry I can't be more helpful! Did you check her heart? Heart issues sometimes suddenly kill chickens, that's for sure.
