One power turbine failure on a C130E at about 2000hrs, interestingly about 5 mins before TOPD at the end of a 3 hour trip cruising at F250. Still raised the pulse rate a little, despite the fairly normal descent and approach.
Second and last one (so far) on a F900 at about 3500hrs in 2001. This one was at climb thrust passing about 10000'... also a power turbine failure, although it was No 2 (out of 3) so straightforward from a handling point of view.
Also have about 1000hrs in there flying behind an IO-360, which never gave me any grief whatsoever
