Both the aerial cameramen who filmed BoB, John Jordan and Skeets Kelly were killed in flying accidents after the film - I think it was Kelly who died in a midair between an SE-5A replica and the helicopter he was in whilst filming Darling Lily IIRC, and John Jordan fell out of the back of the B-25 used for filming Catch 22 in Mexico... might have been the other way around...
Also, I seem to recall that the one who fell to his death had lost part of a leg whilst filming the James Bond film with Little Nellie - You Only Live Twice? - I think that was an accident with a helicopter...