[patrolpilot]

Yes, the 400IFCS is the key to keeping it with glass. Without it, the basic 400A, there aren't any options because of the analog attitude and navigation reference. At least, that was a year ago when I paid a shop to sit down and try to figure it out at their hourly rate. Specifically, I wanted to go to the two G5s with my dual 430W as a lead into something greater once I made some primary improvements to my airplane; gear door removal, cargo pack, and air conditioner.

They went beyond the G5s, looking for any approvals for the airplane, but it failed when you got to the autopilot supplements. Things change, and this was a year ago; I doubt it given what goes into an STC and the remaining number of airframes and their age, but maybe there is hope. The best-case scenario for my airplane they could find was to keep the Sandel 3308, purchase the WAAS software ($,$$$), and buy spares. This far outweighed the only replacement autopilot option; the STEC 55.

I'm not a fan of the 55; I've flown too many airplanes with it, and there is something, at least one feature, that is always out. My avionics guy is not a fan of it (said he would not install one), and the guys at APC will tell you that to keep it right, it takes more maintenance than a 400A (of course, there are more flight profile features). There is also a good Cessna Owners Association article about keeping the 400A as the replacement options are less desirable. Of course, many 400s are in bad shape because no one seems to want to spend money on autopilot maintenance or keep them tuned up (the problem with the 55s I've flow and the manufacture is an hour flight away). Any autopilot needs regular maintenance.

Personally, I'm okay with steam gauges, especially with an iPad with ForeFlight. Of my 22K flight hours, only about 25% of them are behind glass. I flew the B737-200, 300, 500, 700, and 800 and never had a problem jumping from one to the other. I even had a single day where I flew four different models, steam to glass and back. For the money, I'd rather have a weather radar in my Skymaster than spend the money on the typical glass installation. Also, Garmin's planned obsolescence (which the others follow) bugs me for the money that goes into the glass. I once was the Aviation Director of a large corporate flight department. I cannot picture going before the board of directors to ask for money for the airframe on the cycle that Garmin runs; the equipment and installation cost vs. airframe value; I would have been replaced. My CFO (wife) is very lenient, but she would croak if I truly explained that last statement.