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Firewall questions
I'm putting a 56' Tri-Pacer back together an was hoping for some tips/insight. I bought a new stainless steel firewall from the cub doctor (it's beautiful) http://cubdoctor.com/stainless-firewalls/index.html .
Two questions to start,
1. The firewall does includes a "flange". Does this flange fulfill the requirements of SB 161A https://www.univair.com/content/PIP_SB0161A.pdf piper part number 754 237? Univair sells it now as 3 separate parts (nearly $450 total)
https://www.univair.com/piper/piper-...-moulding-top/
2. I also need a firewall blanket. I found this at Spruce https://www.aircraftspruce.com/catal...rewallsets.php . Any opinions on it? Should I add a heat barrier or sound deadening behind the blanket?
Thanks,
Dave
Last edited by westypilot; 02-03-2020 at 10:55 AM.
Reason: added sb link
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Re: Firewall questions
I too replaced the firewall of a 56 Tri-pacer and used the Clyde Smith firewall. To answer your question, the flange on the firewall is to mount the boot cowl, and does not meet SB 161A. I installed the 3 piece molding around the firewall to comply with the SB. As for the firewall pad I bought mine from Airtex https://www.airtexinteriors.com/ and it fit well and looks good.
Hope it turns out well,
Steve
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Re: Firewall questions
Exactly what Steve said. I bought the molding from univair, extremely over priced
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Re: Firewall questions
Concur with above. The firewall flange faces forward, and the boot cowl attaches to it. Flammable fluids can migrate through this interface and cause a fire hazard. The SB parts are a U channel that covers this interface making it much harder for fluids to get behind the firewall.
Sent from my iPhone using Tapatalk
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Administrator
Re: Firewall questions
There are some pictures of the flanges that do away with inspection called out in AD 57-22-01 in this thread. https://www.shortwingpipers.org/foru...spection/page2
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