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Emergency System Air Leak

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ChangDriver

Joined: 15 Sep 2007
Posts: 266

Posted: Thu Oct 15, 2009 6:39 pm Post subject: Emergency System Air Leak

Dennis:



You posted this:



"If your emergency system is leaking, the first place to look is at the rubber O-ring under the 22 mm nut on the air bottle. A very common problem particularly if the tank was recently removed from the airplane and the fittings removed from the tank for inspection or servicing. The next place to look is the emergency air valve. Remove the output line from the emergency air valve with the valve completely closed. Spray soapy water on the output fitting on the valve. If it bubbles, the valve is leaking internally."



Where does one get the o-ring for the fitting on the emergency air bottle?  My system leaks all emergency air pressure out in two days.  Will do the other tests, but the bottle was removed and reinstalled once or twice in the recent past.  ALso verify this info would be for a CJ not a Yak.



Craig

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skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Thu Oct 15, 2009 6:57 pm Post subject: Re: Emergency System Air Leak

Craig,,,



this happened to me last fall.... was the check valve on the firewall, on the right hand side of the plane (when seated in the pilots seat) about half way up.



Refurbished the check valve with new seals and spring, and no more problems.  



Might want to check the easy stuff first.



Mike

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_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

dsavarese0812(at)bellsout
Guest

Posted: Fri Oct 16, 2009 4:12 am Post subject: Emergency System Air Leak

Craig,

 Check with Doug or Jill at M14P, Inc since the emergency air  bottle on the CJ and 52 are the same.  Yes, the tests mentioned definitely  apply to the CJ.  In the CJ, either one or both of the emergency air valves  could be leaking.  Both are easy to get to on the CJ.  So if you don't  find the leak at the bottle, check both valves.  One other thing you may  want to check is the flare inside the B-nut on the emergency air bottle.   If the flare was cracked during re-installation, it will not seal up.  But  a leak caused by a cracked flare should easily show up by spraying the soapy  water on the tubing going into the B nut. Leaking down in two days is a  pretty bad leak.  The soapy water tests mentioned should identify  it.....hopefully.

  

 Dennis

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dsavarese0812(at)bellsout
Guest

Posted: Fri Oct 16, 2009 5:42 am Post subject: Emergency System Air Leak

One last thing to check Craig is spray soapy water on the  external air fill port opening and see if it bubbles.  If it does, you have  a bad check valve which keeps the emergency system from leaking air back out the  external air fill port.  This is also not uncommon.

 Dennis

  

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