There is no lubrication to the prop once the engine shuts down. It's a free
turbine so the front end (back in most PT6 turbo prop installations) can be
long shutdown while the prop would be merrily spinning.

Mat

--
Matthew Waugh
Comm. SEL MEL, CFI-AI
http://home.nc.rr.com/mwaugh/learn2fly/index.htm

"MLenoch" wrote in message
...
Why do we pull the props back to feather prior to shutting down? I cannot
see
any reason for this. This seems a useless procedure on the shutdown
checklist.

If the prop levers are left forward upon shutdown, the prop blades will go
into
feather when oil pressure drops off. On start up, the props will
unfeather
with the same spool up as if the check list was followed.
Thx in advance,
VL