The Cessna 120-140 Association Forum

Putting my firewall back together. Didn’t take it apart was like this when I got it. I’m in the process of putting the heater / cold air assy back on the firewall. And I have a bag with some parts in it. Not sure what this is. I know it’s broken. But still would like to know what it is. Can’t find it in the IPC.

I did a cursory look at part# 0450247 images online and can't figure out where something like that would go. Same as early Cessna 150's.

What kind of material is it? It looks like it might have been a ceramic insulator: not part of the heater control valve, as far as I can remember.

A member of the C-170 crowd who apparently "trolls" this site sent me the following, an amazing example of sleuthing! With his permission, I am posting it here.

Hi John,
I’m an A&P/IA restoring a 1952 C-170B and happened to see the question regarding an unknown part in this thread:
https://www.cessna120140.com/Forum2018/ ... ba9#p17546

Googling the number “458” found on the mystery ceramic piece + “insulator” leads one to this website:

https://www.rfparts.com/458-birn-p.html ... KVrJRguQFI


That looks an awful like the bottom half to p/n 0411067 “insulator assy.” found in fig. 56-12 and fig. 57-15 for the G.E. Radio Installation in the C-120/140 IPC. and Univair’s p/n 0411067-1.
https://www.univair.com/electrical-syst ... insulator/
Regards,
Gary Friesen

Thanks Gary!
Drop the mic!