---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Sun 10/07/12: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:11 PM - Re: Stall Warning Failure (ledson) 2. 06:12 PM - Re: Stall Warning Failure (ledson) ________________________________ Message 1 _____________________________________ Time: 06:11:21 PM PST US Subject: Allegro-List: Re: Stall Warning Failure From: "ledson" 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 _____________________________________ Time: 06:12:20 PM PST US Subject: Allegro-List: Re: Stall Warning Failure From: "ledson" 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message allegro-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Allegro-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/allegro-list Browse Digests http://www.matronics.com/digest/allegro-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.