Originally Posted by crackling jet
Sitting here and listening to the steady tick tick tick...
Whenever there is metal to metal contact (which is the sound you are hearing) there will be wear, but it is insignificant.
Originally Posted by Gas Bags
Where do you guys learn this stuff
From the manufacturers. Where do you learn your stuff?
I have yet to see a notice in any form from either Rolls, Pratt or GE saying that "An engine should never be allowed to windmill.". In fact, after 25 years of turbine engine experience in line, base, overhaul and operational environments you are the only one who have ever said such a thing.