im not sure which ap I have but it looks to be original and is single axis. From what I have read Im guessing its a autocontrol lll but not sure. The problem I have is getting it to follow my gps from my 430. It works good using the heading bug but Id really like it to follow my 430. Im not an a&p or IA so I dont need to know exactly whats wrong but does it sound like a simple issue to fix or pretty costly. Ive only owned it for 1 year now and I thought it worked when I first bought it but this was my first purchase and ap wasnt my first thing to tryonce i go her home.