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Does anybody know how the ALT capture works in the combination G1000 + STEC 55x? I mean, how the G1000 sends the information about what is the selected ALT? Is that a kind of "table" of voltage and feet? Do you know which pin the G1000 is connected with the STEC55X computer for this purpose? Just curious, and perhaps could help me diagnose and issue with my AP. Thanks.

We finally were able to change the tubing. But no luck, the AP still is trying to "hunt" the altitude. It looks like the problem might be the transducer itself. We are also noticing that when the AP is activated in the ALT+VS mode, it begin displaying a weird FPS value, like -13 or -14 when the plan is climing at 200 FPM. Any advice, as always, is welcomed!

Thanks a lot @carusoam. We have the S-TEC 55. It has a main box, and then the transducer, that is a separate component. There is three-wire connection between them. The transducer receives the static system from a T just before the connection to the backup airspeed indicator. And yes, and you say, it uses a rubber tube for the final connection to the transducer. It looks aged, the airplane is from 2005, so close to 20 years. So we want to change it. The problem is that it is difficult to reach the transducer. Trying to find tools that will allow us to cut the current wire that fixes the rubber tube to the transducer, and then be able to "remotely" connect the new rubber tube. Of course, any advice is highly welcome.

UPDATE: we were able to remove the glare shield without too much difficulty. Then, to reach the AP transducer, that is our goal, we had to remove the annunciator panel, which was more or less easy. Finally, we got to see the AP transducer and the tubing that we want to replace, since it looks like it's giving incorrect information to the AP. The tubing looks a bit damaged, so it might be the case that is the cause of the problem. But... we were unable to access the transducer from there. There are a couple of holes in the annunciator tray that allow some access, but not enough to be able to remove this tubing. In the other hand, it looks difficult to remove the transducer itself to make the connection outside (it has two nuts, the one above seems easy to remove, the one below looks difficult). Any advice?

Thank you very much. That's very useful. It looks like it is not very difficult to fully remove it. The version of that piece (2) in our Ovation 2 GX looks like it's only one piece, in contrast with the illustration where it looks like can be divided in two for removal.

Thanks a lot. Yes, it sounds like a reasonable name. And yes, it changed a lot over models.

Hello everyone, I'm trying to diagnose an issue in the transducer of my AP, in a G1000 Ovation 2 Mooney. It looks like there is very easy to access to this component if the piece that "covers" the panel is removed -- I mean, the part that is on top of the G1000 screens, below the windshield. I saw that it has two screws on the sides, and one for a cover behind the compass. Is that all? Any technique to be able to remove it? Thanks!

Any CFI in the Longview, TX area?

Beautiful aircraft! Congrats!

Congrats! Looking forward to that additional media coverage!

Thanks for your answer. Very useful information.

Thanks for sharing your experience. For sure, it is still a very solid candidate for us. Just waiting for the documentation for the owner, and then going on to price negotiation phase! We also prefer not to have TKS since in Argentina there is very few support for that kind of flights. Our ideal one will be 310 HP, with or without AC, but no TKS, no WAAS.

Sure! That's the plan. We hope that the owner understands that huge hit in the value. The listed price seems to be very high taking into account this detail.

Well, the plane will be registered in Argentina, and we don't expect support for WAAS soon (and if we sell it, it will be sold in Argentina). So it depends on for how long we have it and how that standard evolves in South America. In any case, it's an opportunity for us because it's something that we don't need, but at the same time it decreases the value significantly.

By the way, the seller confirmed that the G1000 in that Mooney is not WAAS.