[Capt. Fantastic]

Several points:

(1) This engine could not have been operated in that condition.
(2) The belts are certainly there to keep the fanblades in place during transit.
(3) The engine was most likely shipped to a repair facility after ingesting metal debris.
(4) While it _could_ have been shipped attached to an aircraft (ferried IOW) that is an expensive, error-prone way to move such a large item.

So... IMHO this is a legitimate picture of a damaged engine. But whether it was attached to an aircraft at the same time that aircraft was transporting paying passengers is doubtful. Note that a four-engine airplane would fly safely with only three operable engines. But it would fly much lower and much slower and Air Traffic Controllers would notice. The point is that someone somewhere-- particularly in Western Europe-- would ask questions.