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Air system trouble

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raf

Joined: 04 Oct 2016
Posts: 6
Location: Lachute, Qc CSE4

Posted: Sun May 28, 2017 7:03 pm Post subject: Air system trouble

Hello,



Last week, I flew the YAK52 and everything was normal, after the start, the bottle was charged even before take off. Then, on another flight, I started the engine, the gage indicated around 30, during the warm up, taxi and all flight (30 min), the air system went down to 20 due to use of flaps and gear retraction/extension. I hear a light leak but not sure of the origine.



Today, same thing happened. First flight was non event, second flight, same problem.



Any input?



Raf

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dsavarese0812(at)bellsout
Guest

Posted: Mon May 29, 2017 5:14 am Post subject: Air system trouble

Are you saying the main air system is not recharging to whatever the pop 

off valve/pressure relief valve is set to?

When you turn on the main air valve, do you hear any air leaks coming 

from the gear selectorin the front cockpit?

With the rudder pedals centered, do you hear any air leaks coming from 

what sounds like under the floor behind the front seat.

Are you certain the snot bottle is fully closed?



 	  Quote: 	
		  From your description of the problem, there are too many things it COULD 

be. Lets try to isolate the problem. You can email me off list if you 
	


prefer and we will go though this step by step.

Dennis



A. Dennis Savarese

334-546-8182 (mobile)

www.yak-52.com

Skype - Yakguy1



On 5/28/2017 11:03 PM, raf wrote:

 	  Quote: 	
		   



 Hello,



 Last week, I flew the YAK52 and everything was normal, after the start, the bottle was charged even before take off. Then, on another flight, I started the engine, the gage indicated around 30, during the warm up, taxi and all flight (30 min), the air system went down to 20 due to use of flaps and gear retraction/extension. I hear a light leak but not sure of the origine.



 Today, same thing happened. First flight was non event, second flight, same problem.



 Any input?



 Raf





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=469678#469678

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Viperdoc

Joined: 19 Apr 2014
Posts: 484
Location: 08A

Posted: Mon May 29, 2017 12:05 pm Post subject: Air system trouble

You could hear a faint leak in flight? 

If you hear a faint leak from what direction does it come from?

Doc



Sent from my iPad



 	  Quote: 	
		   On May 28, 2017, at 10:03 PM, raf <arlaviation(at)gmail.com> wrote:

 

 

 

 Hello,

 

 Last week, I flew the YAK52 and everything was normal, after the start, the bottle was charged even before take off. Then, on another flight, I started the engine, the gage indicated around 30, during the warm up, taxi and all flight (30 min), the air system went down to 20 due to use of flaps and gear retraction/extension. I hear a light leak but not sure of the origine.

 

 Today, same thing happened. First flight was non event, second flight, same problem.

 

 Any input?

 

 Raf

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=469678#469678

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_________________
Viperdoc

raf

Joined: 04 Oct 2016
Posts: 6
Location: Lachute, Qc CSE4

Posted: Sat Jun 03, 2017 11:38 am Post subject: Re: Air system trouble

Hello,



Since the last flight, we put Nitrogen in the system to refill it. Pressure was 35, I started and then the compressor and air bootle started to charge. No leak was hear, the charge was good.



One question, I 've seen that some guy put a little Oil to make sure the valves close/open correctly. I put the plane for storage over the winter, maybe some Humidity has entered valves?

Is it possible?



Raf

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