Lemurian
Of course, the responsibility of the supervisor who presumably signed the chit off and the airline procedures are heavily engaged, and that's what tyhe verdict reflects, too.
I am not sure you are correct in affirming that the supervisor's liability was "engagé. "
As I read the verdict, the supervisor was "relaché".
Continental was not, nor was the mechanic.
(Forgive my smugness, but notwithstanding your impeccable English in your posts, you are slightly guilty of a small dose of franglais there. "Engagé" does not easily translate, and "engaged" is not really English at all in this context).
But I appreciate the qualty of your contributions.