Originally Posted by
barit1
Purely speculative - but I have seen a case where a very tough foreign object was ingested, and a fan blade snagged it, tossed it back forward and outboard.
Never saw a duct penetration like this, however.
Nothing unique about this inlet penetration. Pieces get thrown forward and sometimes the inlet gets penetrated by the pieces that rebound off the hard engine made containment structure. take a look at the pics from the various similar events in Oz, regardless of the engine model.