Well here's a fairly recent one from the aaib it indicates some of the damage that can occur.
<A HREF="http://www.aaib.detr.gov.uk/sep99htm/gawnjf2.jpg" TARGET="_blank">www.aaib.detr.gov.uk/sep99htm/gawnjf2.jpg</A>
The cause.....a 4lb grey heron!
[This message has been edited by gas path (edited 05 December 2000).]