In article ,
Jim Weir wrote:
There was an AD several dozen years ago that affected [almost] all McCauley
props. The idea was to fill the hub with red hydraulic fluid so that any leaks
would be immediately apparent to the most casual observer.

How long does such a prop last if it starts leaking in flight? I've
seen people put up with grease-spitting props for a long time. Even fly
it to the overhaul location. Doesn't seem like you can do that with
oil.

--
Ben Jackson

http://www.ben.com/