Engine hose type

[cferr59]

7 hours ago, Jpravi8tor said:

 Clarence, thank you for your continued interest. I have been studying the parker stratoflex manuals and still cant come up with a size for that hose (assuming the 530 is a size?)

Funny thing the lycoming ipc doesnt show oil cooler p/b's because its an airframe part

Hose is Stratoflex 111-8 on an M20C. It is probably the same on an F model.

 

As far as producing the hose, does anyone have thoughts on the hoses as an owner produced part:

From AC-20-62E:

"Parts produced by an owner or operator for maintaining or altering their own
product and which are shown to conform to FAA-approved data. "

I imagine there is some kind of pressure test that needs to be done, but I would think that applies to hoses produced by an A&P too.

Also, my understanding is that the oil cooler hoses are only under pressure when the vernatherm is open so a standard run-up may not find leaks. I just changed the oil cooler hoses with hoses from PHT (I do not know enough to make the hoses and was not sure of the legality) and ended up doing a test flight near the airport until the engine had warmed up enough to open the vernatherm.

[EricJ]

59 minutes ago, cferr59 said:

Hose is Stratoflex 111-8 on an M20C. It is probably the same on an F model.

 

As far as producing the hose, does anyone have thoughts on the hoses as an owner produced part:

From AC-20-62E:

"Parts produced by an owner or operator for maintaining or altering their own
product and which are shown to conform to FAA-approved data. "

I imagine there is some kind of pressure test that needs to be done, but I would think that applies to hoses produced by an A&P too.

Also, my understanding is that the oil cooler hoses are only under pressure when the vernatherm is open so a standard run-up may not find leaks. I just changed the oil cooler hoses with hoses from PHT (I do not know enough to make the hoses and was not sure of the legality) and ended up doing a test flight near the airport until the engine had warmed up enough to open the vernatherm.

As long as it is not a hydraulic line, hose connections can be replaced under owner maintenance, as can pre-fabbed fuel lines.    An A&P can "supervise" you to do nearly anything an A&P can do, which includes fabricating hoses.    If you want to do it yourself there's certainly a way to get there from here.   Talk to your A&P/IA about what they're comfortable with.

Making hoses isn't hard, but don't be sloppy, learn the procedure, and use the right tools.

Edit:   Even if you do OPP, an A&P has to determine its airworthiness and install it, so it's not going to be much/any different than just making the hose under "supervision", which an A&P can do.    OPP is better for things that an A&P is not allow to make/fabricate, which covers a lot of stuff.

 

 

Edited June 14, 2022 by EricJ