Pilotjim77
Well Known Member
My TT ADI Pilot II is functioning only in the gyro backup mode. My avionics shop recently installed a G430W and 2 older GRT Efis displays (WS). When they tested the panel, the autopilot was working correctly. However, now it does not seem to be receiving input from the GPS.
Before bringing the airplane back to the shop, I would like to do a voltage check on the autopilot input pins on the harness. I understand that pin 17 is the serial input, and pins 14 and 15 are the arinc inputs. What voltage should I expect from these pins when I power up the 430 and the GRT Efis displays?
Are there any other reasons I might not be getting input from the GPS?
Before bringing the airplane back to the shop, I would like to do a voltage check on the autopilot input pins on the harness. I understand that pin 17 is the serial input, and pins 14 and 15 are the arinc inputs. What voltage should I expect from these pins when I power up the 430 and the GRT Efis displays?
Are there any other reasons I might not be getting input from the GPS?