Teflon Hoses , proof that they are "on condition"

[Hank]

1 hour ago, PT20J said:

Which begs the question: Who's airplanes did you put those hoses on? 

I use Advance Auto and Storeroom Fastener to make hydraulic hoses at work. Advance over lunch, Storeroom while I wait. Not quite the same thing . . . .

I ordered new firesleeved hoses for my C from someone in OK, I think. Called them first, then LASAR, who told me that I had already contacted their supplier. Integral sleeves. Less than an AMU for the full set I think, call it 5 years ago.

[N201MKTurbo]

1 hour ago, PT20J said:

Which begs the question: Who's airplanes did you put those hoses on? 

Not airplanes. Mostly work stuff.

 

When we were building the Missile fueling system, they liked this particular type of Sant  Grobain  clear hose. I was trying to find someone who could put AN fittings on it. Nobody around here could do it, not even the airplane hose shop. We finally sent them to Swagelok in Ohio. The local Swagelok shop couldn’t do it. They turned out beautiful. 

[MB65E]

I love Teflon hoses. Nothing is more of a waist of time than waiting for standard hoses to be remade every <10year. However,  Post engine overhaul, the current Lycoming SB 240 says hoses must be changed to be considered Major overhaul. 

I guess my OH can’t be considered a Major OH… HA!

-Matt

Edited February 17, 2023 by MB65E

[Guest]

TheLycoing hose replacement required in SB240 only refers to hose that Lycoming installed, not those that connect the engine to airframe components.  So hoses shown in the engine IPC would be required.

[jetdriven]

8 hours ago, MB65E said:

I live Teflon hoses. Nothing is more of a waist of time than waiting for standard hoses to be remade every <10year. However,  Post engine overhaul, the current Lycoming SB 240 says hoses must be changed to be considered Major overhaul. 

I guess my OH can’t be considered a Major OH… HA!

-Matt

It's funny because when you get the Engine from the factory it says major overhaul right there on the first page. Funny how their service instruction says that if you don't calibrate the airframe engine gauges it's not overhauled. 

[Yetti]

Aircraft spruce can also do hoes.   I just got a fancy brown one from them to install the Fuel Flow sender.

[Andy95W]

3 minutes ago, Yetti said:

Aircraft spruce can also do hoes. 

Good to know.

[EricJ]

1 hour ago, Andy95W said:

Good to know.

And apparently they can install parts!   Bonus!

 

[RoundTwo]

1 hour ago, Yetti said:

Aircraft spruce can also do hoes.   I just got a fancy brown one from them to install the Fuel Flow sender.

Glad to hear they’re expanding their business model. However, this isn’t a direction I would have thought they would have taken.  

[Hank]

2 hours ago, Yetti said:

Aircraft spruce can also do hoes.   I just got a fancy brown one from them . . . .

Blondes must be both fancier and more expensive!

54 minutes ago, RoundTwo said:

Glad to hear they’re expanding their business model. However, this isn’t a direction I would have thought they would have taken.  

That's one way to Spruce up your Aircraft!!

      

[cliffy]

Its interesting how we go around and around the same circles year after year here.

A&Ps can make hoses in house

A&Ps can supervise the making of hoses

Limitations are in AC 43.13 and manufacture's instructions if one can only read

This is not rocket science

This is only low pressure  hose assemblies (<100 psi) in our engine compartments except for the rear governor hose that is about 600 psi IIRC  

These are NOT 3000 psi systems like in Boeings. We had a dedicated shop in house for those (mostly SS)

If the AN fittings are in good shape they can even be used over again. 

Standard 303 Aeroquip hose is cheap but needs to be remade every 8 years or so. 

Fire sleeve can be pulled over any 303 hose and secured with a safety wire band at each end 

to prolong life NOT so much by protection from fire BUT heat from the exhaust system. Very similar

to the silicone sleeving of teflon hoses

The only detriment to 303 is age and heat. But they are easy and quick to make. An hour for each hose would be pushing it.

Back in the radial engine days we made LOTS of 303 hoses in house. They still work fine today. 

Teflon hose is more expensive, takes special tools and lasts almost indefinitely.

You pay your money and you take your choice. Both work well.

[N201MKTurbo]

On 2/18/2023 at 5:11 PM, RoundTwo said:

Glad to hear they’re expanding their business model. However, this isn’t a direction I would have thought they would have taken.  

Aircraft Spruce acquired Aero Performance. Aero Performance acquired Varga Aircraft. Varga aircraft had a hose shop, so now Aircraft Spruce has a hose shop. It is the hose shop I’ve been using for years. It used to be at KCHD, now it’s down the street from KCHD. It’s good to have an Aircraft Spruce will call down the street!

[A64Pilot]

Thinking about this a bit, It may be hard to “prove” regular hoses are life limited, much less that teflon isn’t. My bet is they may both be on condition, or if they were life limited, aren’t all life limited parts required to be tracked?

Does anyone change their rubber brake lines every x years?

There are a LOT of “rules” I’ve looked for and can’t “prove” like the requirement for a min of one thread exposed on a self locking nut, but no more than three. Sure I was taught it, understand the logic, but where is the requirement written?