Hi!
I have a client with an old P-Series 7028-6C4 running AIX 5.1 that crashed and was hard-reset. However it won't boot, and has the dreaded 0517 error.
I booted from a 5.1 ML3 CD (the same as on the host) and entered the recovery shell, fsck'd the rootvg LV's, did the logform stuff, the IPL...