I've read about the problems with having aluminum heating ducts on the firewall so I went to a stainless duct. But what about the fuel line bulkhead fittings? I'm fuel injected so I don't have a gascolator attaching to my firewall bulkhead fuel and purge return line fittings. I have some non-stainless steel bulkhead fittings I could use but a local A&P recommended I stick with aluminum AN832s since my AN sleve fittings and tubing are aluminum. He thinks the corrosion potential from having steel on aluminum would be a bigger issue. If this is a bigger problem, what about using stainless brake lines on the gear legs if they attach to aluminum AN832 bulkhead fittings? If you want to use stainless or steel anywhere in the fuel and brake line system does every single part need to be the same metal?
Al Thomas
N880AT RV-8A QB
FWF & Finishing
Al Thomas
N880AT RV-8A QB
FWF & Finishing