I wonder if this is a case for putting 5 or 6 cameras around the aircraft to allow flight crew to actually see whats going on beneath, above and at the back of an aircraft. Such devices really wouldn't be that expensive espetially since the new breed of wide-bodied jets almost all have a camera installed on the tail. Just add a few more to give the pilots a good view of the engines and a few other critical points, namely the landing gear and you've saved a lot of head ache. Sometimes just being able to look at the part in question as opposed to trying to sit in the cockpit and diagnose problems from the resources would make things a lot easier, especially when one look would be enough to diagnose a problem that would otherwise take much longer to figure out, best example is landing gear issues, which almost always require a low and over. It would have been an easy situation in this case, turn on the camera look at the engine, see that parts were missing, land the aircraft. Quite simple.