Today's Message Index:
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     1. 06:11 PM - Re: Stall Warning Failure (ledson)
     2. 06:12 PM - Re: Stall Warning Failure (ledson)
 
 
 

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Time: 
06:11:21 PM PST US
Subject: 
Re: Stall Warning Failure
From: 
"ledson" <ledson@oneil.com>
      
      
      The stall warning system is repaired.  Follow the guidance that was provided by
      Doug Hempstead, we performed diagnostics by parts replacement.  Not my preferred
      approach, but without and understanding of the wiring and the board logic,
      it was the only way to go.  We started by replacing the circuit board and then
      test flying the airplane.  No change. We then ordered the pressure switch from
      Allegro USA.  When we received the new pressure switch, we replaced the new
      circuit board with the old one. (Doug was good enough to take it back with no
      charge). We replaced the pressure switch, test flew the airplane and the stall
      warning system performed just like it should.  It required no adjustments. 
      Stall warning was about 5 MPH above stall.   
      
      I'm thankful that it is repaired so I can enjoy the wonderful fall colors here
      in Ohio.  
      
      Thanks to everyone that provided suggestions and assistance during this repair.
      
      
      Larry
      
      N4362C
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=384901#384901
      
      

Message 2


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Time: 
06:12:20 PM PST US
Subject: 
Re: Stall Warning Failure
From: 
"ledson" <ledson@oneil.com>
      
      
      The stall warning system is repaired.  Follow the guidance that was provided by
      Doug Hempstead, we performed diagnostics by parts replacement.  Not my preferred
      approach, but without and understanding of the wiring and the board logic,
      it was the only way to go.  We started by replacing the circuit board and then
      test flying the airplane.  No change. We then ordered the pressure switch from
      Allegro USA.  When we received the new pressure switch, we replaced the new
      circuit board with the old one. (Doug was good enough to take it back with no
      charge). We replaced the pressure switch, test flew the airplane and the stall
      warning system performed just like it should.  It required no adjustments. 
      Stall warning was about 5 MPH above stall.   
      
      I'm thankful that it is repaired so I can enjoy the wonderful fall colors here
      in Ohio.  
      
      Thanks to everyone that provided suggestions and assistance during this repair.
      
      
      Larry
      
      N4362C
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=384902#384902
      
      








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