PAXboy
As I understand it, these problems have occurred after a turn-around, not a layover? That is, interpreting 'layover' as being one that involves very specific engineering checks when the a/c is at a base, rather than a two or three hour turn down line, such as JNB or NBO.
Not necessarily.
US AIR (and others) have layover checks performed down the line.
My point is that at least the body would be found after one flight. It doesn't exactly look good when a body is flown several sectors when it really should have been discovered at the next transit.