Want to purchase a S-Tec 55X Autopilot

[kilr4d]

Originally Posted by cessna337d

better make sure your avionics shop will install a used one I found one and asked my shop and he said we had to go back to s-tec and get new paper work per your serial number and they would not reuse mounting brackets I would have to buy new ones.

This is correct. They MUST go back to S-Tec to be recertified and it is quite expensive.