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Old air system modification.

 
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lesknox



Joined: 31 Mar 2009
Posts: 4
Location: Australia
PostPosted: Fri Dec 07, 2018 9:52 pm    Post subject: Old air system modification. Reply with quote
An aircraft I have an interest in appears to have the early version of the air system. Notably, the pressure regulator valve, filter and NRV “tree” is behind the rear seat.
Originally, I believe, there was an isolation valve immediately downstream of the water drain on the engine side of the firewall. This is not there now.
On the cockpit side of the firewall there is a line that runs from the start valve to the EDP supply line that runs back to the “tree”. A NRV is incorporated in this line.
I’m thinking of removing this line.
Has anyone done this or is aware of any issues associated with its removal?

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billlang(at)live.com.au
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PostPosted: Fri Dec 07, 2018 11:36 pm    Post subject: Old air system modification. Reply with quote
NRV = Check Valve

Sent from my iPad

Quote:
On 8 Dec 2018, at 17:00, lesknox <lesknox(at)tpg.com.au> wrote:



An aircraft I have an interest in appears to have the early version of the air system. Notably, the pressure regulator valve, filter and NRV â?otreeâ? is behind the rear seat.
Originally, I believe, there was an isolation valve immediately downstream of the water drain on the engine side of the firewall. This is not there now.
On the cockpit side of the firewall there is a line that runs from the start valve to the EDP supply line that runs back to the â?otreeâ?. A NRV is incorporated in this line.
Iâ?Tm thinking of removing this line.
Has anyone done this or is aware of any issues associated with its removal?




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n13472(at)aol.com
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PostPosted: Sat Dec 08, 2018 8:21 am    Post subject: Old air system modification. Reply with quote
What type aircraft??????????

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wlannon(at)shaw.ca
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PostPosted: Sat Dec 08, 2018 10:57 am    Post subject: Old air system modification. Reply with quote
What aircraft type??????

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wlannon(at)shaw.ca
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PostPosted: Sat Dec 08, 2018 11:06 am    Post subject: Old air system modification. Reply with quote
NRV = Check Valve ?

Well, yes and no! NRV means Check Valve, non-return. Not, for example
Check Valve, restricted flow, etc.
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lesknox



Joined: 31 Mar 2009
Posts: 4
Location: Australia
PostPosted: Sat Dec 08, 2018 1:08 pm    Post subject: Re: Old air system modification. Reply with quote
It’s a Yak52.

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