by John Fuller » Mon Aug 26, 2013 12:48 am
I have an S-TEC 55 in my PA-39 that has worked without maintenance for 13 years and over 2,000 hours, with GPSS recently added. Having been flying for over 40 years with various autopilots, mostly Century, this is unheard of for me. But I miss attitude hold in climb, something that I have learned to live with (leave vertical mode off and trim for the attitude/speed I want). Meanwhile, we recently installed a new Century 2000/Triden system in another aircraft (Century was the only STC'd sytem) and it took over a year to get them to quote and then deliver it. Bottom line, and this comes from our avionics shop too, I'd go with S-TEC every time if the autopilot has the capability I need. The Century system offers better features but you will be dealing with the company for as long as you own the system. Ask yourself (or your avionics shop) who will be around offering the better support in 10 or 20 years.
John Fuller
PA-39 N8934Y
ICS 268