---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Thu 08/02/12: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:47 AM - Re: Stall Warning Failure (Jerry Goldberg) 2. 02:02 PM - Re: Stall Warning Failure (Brad Kramer) ________________________________ Message 1 _____________________________________ Time: 09:47:55 AM PST US From: "Jerry Goldberg" Subject: RE: Allegro-List: Stall Warning Failure We do have an unusual stall warning system. The ASI has a stall warning electrical connection. A pressure switch interfaces between the static system and the control board. It causes the green light to light & powers the system. When stall setting approaches, the ASI sends a signal to the board to change the light to red & sound the horn. Your problem sounds like either the static connection to the pressure switch is bad, the pressure switch itself is bad, or the ASI setting mechanism has failed. The pressure switch is available through suppliers, its number is printed on the side. Trouble shoot it to see it is closing with a meter. Check your ASI connections in the back to see they are clean. If it's the internal ASI or the board, no one can fix it. So you would have to get a separate stall warning system. Let us know how it goes. Thanks, Jerry Goldberg N44456 X09 ________________________________ Message 2 _____________________________________ Time: 02:02:05 PM PST US From: "Brad Kramer" Subject: Re: Allegro-List: Stall Warning Failure I don't understand how the airspeed indicator would play a role in determ ining when to sound a stall warning. It can't sense angle of attack, Any ideas? I'm curious now to peek behind my panel and see exactly how this all work s. (which I really should know anyway) Brad / N221FA -----Original Message----- From: Jerry Goldberg [mailto:jkgcpa@ix.netcom.com] Sent: Thursday, August 2, 2012 11:47 AM Subject: RE: Allegro-List: Stall Warning Failure l stall warning system. The ASI has a stall warningelectrical connection. A pressure switch interfaces between the staticsystem and the control bo ard. It causes the green light to light & powersthe system. When stall se tting approaches, the ASI sends a signal to theboard to change the light to red & sound the horn.Your problem sounds like either the static connec tion to the pressure switchis bad, the pressure switch itself is bad, or the ASI setting mechanism hasfailed. The pressure switch is available thr ough suppliers, its number isprinted on the side. Trouble shoot it to see it is closing with a meter.Check your ASI connections in the back to see they are clean. If it's theinternal ASI or the board, no one can fix it. So you would have to get aseparate stall warning system.Let us know how ========================_ ============= ------------------------------------------------------------------------------------- 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.