That's why you want to make sure it's not a connectivity issue. If you just go ahead and send the 55X to S-Tec, which could indeed be defective, it'll be north of $1500 flat fee. Also check that the tray is mounted close enough to the radio rack that the connectors secure before the faceplate bottoms out against the radio rack.

If they are too long they will prevent the 55X from sliding all the way into the tray and make proper connections. These screws are I believe #2 and are screwed inward from the outside way in the back of the tray. The backplate is what the connectors are secured to. 2) I've seen this scenario before: There are four screws that secure the entire backplate to the tray. Sometimes these plastic backshell screw-holes get stripped and when the unit is slid into the tray and locked, the connectors push out because they're not secured to the tray properly. The rear connectors on a 55X are made of plastic, there are screws going into them from the tray side. A couple of things come to mind for you to check. I doubt the computer stores codes, but the 55X is the latest gen of the series, so who knows. Sent from my Galaxy S5 via Tapatalk Really sounds like you have something flakey going on with the computer. Any other ideas? Does the computer store fault codes? I think I'll have to get it to the avionics shop. So I went out to the plane today and adjusted the roll sensitivity per the instructions and that seemed to work, but I still have a fail indication after the initial BIT.

Does anyone know the cause of this and is there anything I can troubleshoot before taking it to an avionics shop (which is a ways away)? I can reengage it and it will do the same, but then the system will finally display fail and not work unless I cycle power. If it has to make a steering correction, it will get into an oscillation and then turn on with 'FAIL' listed on the Alerter page.

The plane is new to me and wasn't flown much before I bought it, so I'm ironing out the squawks. If I engage HDG or NAV + ALT and the plane is already on steering, it will hold altitude and heading for a while. The SR20 installation of the S-Tec System 55X.Īnyone have issues with an STEC autopilot? I have an STEC-55X in my plane and it's causing some issues. S Tec 50 Autopilot Installation Manual.pdf Free Download Here System 40/50 Autopilots Pilot’s Operating Handbook.

Installation Manual Stec 55X