Non Aircraft/Certified Materials

[skippydiesel]

I am an advocate for using less costly, non aircraft/certified/OM supplied parts, in the maintenance of experimental/homebuilt aircraft (particularly Rotax engine service components) subject to appropriate research of the proposed part.

 

I am often receive very strong opposition to my advocacy, so its with some delight that I reference a small section of advice from a highly esteemed/respected  organisation  - The Bonanza Air Safety Foundation, "Detecting and Preventing Future Aileron Cable Damage Recommendations for Voluntary AD 2019-23-10 Follow-On Actions ABS Air Safety Foundation";

 

"If you do not require heat in the baggage area or aft cabin behind the 3 rd and 4th seats, remove the original ducting completely. Install a 2” PVC plug (Home Depot SKU 741 264) inside the plenum to which the original duct is attached, then use a #36 stainless steel hose clamp (Home Depot SKU 100 494) to tighten the hose around the plug. The clamp and plug may also be purchased from any of the building supply stores. You will need to sand the plug’s outer diameter down slightly to install it inside the flange with a tight fit."

 

I believe "Home Depot" to be a hardware store chain.🤣

 

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[BrendAn]

It's only plugging off a cabin heat ducting . 

[onetrack]

You're drawing a long bow there, Skippy. When you find Home Depot hardware items being recommended for use as critical flight components, let us know! 🙂

There's a world of difference between the terms, critical, and non-critical, in aircraft parts/components. 

[skippydiesel]

Oooooh! selective with our arguments,  aren't we???

 

I think my point is clear enough - if a highly respected certified aircraft, advisory organisation, can recomend parts from a hardware store, the principal of substitution (where appropriate), is  well and truly established.

 

"It's only plugging off a cabin heat ducting ." - so? How do I know that the "plug" will not deteriorate rapidly, allowing toxic fumes to enter the cabin or fall out & interfere with the aircraft control systems, etc etc?? 

 

".........for use as critical flight components" -  what might the definition of "critical" be in this context?? Could it be a part which meets/exceeds all of the published (in my situaton by Rotax) specifications OR as you would have - supplied by the manufactures representative (dealership/agent) on trust with a bit of documentation attached & a high price tag???

 

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[facthunter]

YOUR LOGIC is centred around cost. You are  the one doing doing the cherry picking..  Nev

[onetrack]

If toxic fumes are entering your cabin, then they will coming from the other (open and in use) ducts as well, so your reasoning that a single plug of non-aviation PVC failing, is going to poison the cabin, doesn't stand up to scrutiny.

Besides, you should have a working CO monitor in any aircraft cabin to ensure you don't get accidentally poisoned by toxic fumes.

[skippydiesel]

You guys - you want your cake and then when it suits a non certified cake. 🤣

 

It is now a fact, that you, will use a non certified/non OM supplied item, when/ where it suits you to do so. Your rigelling smacks of hypocrisy.😈

[skippydiesel]

1 hour ago, onetrack said:

If toxic fumes are entering your cabin, then they will coming from the other (open and in use) ducts as well, so your reasoning that a single plug of non-aviation PVC failing, is going to poison the cabin, doesn't stand up to scrutiny.

Besides, you should have a working CO monitor in any aircraft cabin to ensure you don't get accidentally poisoned by toxic fumes.

Me thinks you take the analogy to literally - so I will answer you in the same vain:

 

If one or more of your control surfaces is jammed, due to the  "Home Depot" plug having come loose, no amount of gas monitoring will save you🤣

 

"Besides, you should have a working CO monitor in any aircraft cabin to ensure you don't get accidentally poisoned by toxic fumes."

 

You betray yourself, in your absolute confidence/dependence on third parties to make decision about your homebuilt aircrafts servisabity  - Monitors do not prevent poisoning or anything else. They inform (IF working correctly) & IF the pilot takes note/notices, of a potentially dangerous situaton  -IF!!! the pilot is in a condition to ameliorate the situation, they may save themselves.

 

You could inform yourself about the quality of alternative parts but Noooo!, rather delegate this to a (usually) unknown person(s)  who will issue you a piece of paper, inferring quality/suitability. 

 

As always I support your right to make your own decisions in this area. However find your logic both wanting and now, apparently, inconsistent.🤣😈

[facthunter]

Don't forget ANYONE can read this forum. Have a look sometime and see how many "guests" there are. Some of your Copy would make good fuel for the alarmist fire.  Nev