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Pressurization Leak
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Topic: Pressurization Leak (Read 5723 times)
seanmcgillivray
Jr. Member
Posts: 80
Pressurization Leak
«
on:
November 17, 2021, 07:57:38 am »
Yesterday climbing thru 17k I noticed a high pitch "squeal" and noticed my diff was 5 PSI and the cabin was climbing. I returned down to 15k and commanded the cabin to SL and could only get 4.5 PSI and a 2.5-3k cabin. Clicking on Mass Flow would raise the PSI to 5ish and the squeal would get louder.
I am suspecting the power brake valve boot. Mine look original with silicone slathered on them. I cleaned them the best I can on the ramp and added RTV (couldn't find any PRC).
Anyone change these? I have EAC getting parts and going to try and limp home low on Friday.
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Adam Frisch
Administrator
Hero Member
Posts: 1685
Re: Pressurization Leak
«
Reply #1 on:
November 18, 2021, 12:37:20 am »
Could be anything in the forward firewall or under the panel. Column boot, avionic or electric pass-thru's, outflow valve etc. It can be a pain in the ass to find.
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Slumming it in the turboprop world - so you don't have to.
Bruce Byerly
Hero Member
Posts: 984
Re: Pressurization Leak
«
Reply #2 on:
November 20, 2021, 09:07:33 pm »
You’ll find it quickly with a pressurization cart and a competent service center.
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seanmcgillivray
Jr. Member
Posts: 80
Re: Pressurization Leak
«
Reply #3 on:
November 20, 2021, 10:40:38 pm »
ECA got me up to full diff, but assume when reviving the old airplane the path of least resistance will show itself. Got a service kit and boots shipping this week.
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