1993 M20M

[Horis]

I have an M20M under contract.  one of the hoses is 1997 the others are 2005-8. The Prop has 470 since major, but the prop shop that overhauled it stated in the logbook that the prop should be overhauled at 2400 hours or 6 years whichever comes first. Having had a hose fail in flight before I am more vigilant about hoses. Any thoughts on these items?

[Rwsavory]

You don't need to overhaul a prop based on calendar time, and there are some that don't recommend an overhaul ever, just IRAN. I would be more inclined to have the hoses replaced, if for nothing else than your peace of mind based on your experience. However, if the hoses are the fancy teflon type they apparently last a very long time.

[StevenL757]

1 hour ago, Horis said:

I have an M20M under contract.  one of the hoses is 1997 the others are 2005-8. The Prop has 470 since major, but the prop shop that overhauled it stated in the logbook that the prop should be overhauled at 2400 hours or 6 years whichever comes first. Having had a hose fail in flight before I am more vigilant about hoses. Any thoughts on these items?

I wouldn’t mess with the prop unless you’re seeing slinging grease or experiencing any other issue.  I would, however, consider having it dynamically-balanced unless it has been done recently.

As far as hoses are concerned, I wouldn’t skimp here.  People generally overlook this area and only replace all or certain hoses when overhauling or replacing an engine.  Don’t protect an engine worth tens of thousands with less than $700 of new hose…be proactive about this. It’s inexpensive in the grand scheme.  I’m sure you’ll find other areas of this engine that need attention, based on what your PPI turned up.

[mike_elliott]

Bravos have about $3500 worth of hoses to tackle all in

[LANCECASPER]

1 hour ago, mike_elliott said:

Bravos have about $3500 worth of hoses to tackle all in

6 years ago I got a quote for the 33 Bravo hoses for $3538.33 from aircrafthose.com. Now??

[A64Pilot]

Military which is where pretty much all the standards come from had a replacement interval of five years for pretty much all rubber products, seat belts etc.

Since going to Teflon hoses they are on condition now.

If you replace hoses go with teflon. If there were tires that lasted essentially forever would you buy them?