8MikeXray
Well Known Member
I have a TruTrak RV10 autopilot that has been working normally up until recently. The unit ground tests ok. I have made no changes to cause the malfunction I am experiencing.
In flight it displays 3000 in the SVS (selected vertical speed) window when it is engaged. The autopilot then pitches up to correct the 3000 fpm descent. I isolated the inputs to the autopilot by turning off all of the ARINC and RS-232 feeds and it still shows 3000 when engaged in a stand alone configuration. I am sure it does not do this due to any electrical signal input. If the airspeed is reduced the SVS window value reduces slightly. The 3000 fpm is the max limit for the sensors in the A/P.
The pitot/static system tests and operates normally. The EFIS altitude agrees with autopilot pressure altitude. There are no unusual vertical speed indications on the efis which shares the same pitot/static lines as they are co located close to autopilot.
This unit has 230 hrs on it and according to Bendix/King is no longer serviceable.
Does anyone out there know of a person that may have worked at TruTrak before the company was sold, that may be able to give me some technical guidance on this problem.
Also, does anyone have a TruTrak RV10 or Soccerer autopilot that I can borrow, rent, or purchase to see if the problem lies within my control head?
I think it may be a bad pitot/static sensor in the control head. I put a test set on the aircraft and brought up the airspeed and pressure altitude on the ground to simulate flight and it behaved the same.
Any help would be greatly appreciated!
Thanks,
Mike
In flight it displays 3000 in the SVS (selected vertical speed) window when it is engaged. The autopilot then pitches up to correct the 3000 fpm descent. I isolated the inputs to the autopilot by turning off all of the ARINC and RS-232 feeds and it still shows 3000 when engaged in a stand alone configuration. I am sure it does not do this due to any electrical signal input. If the airspeed is reduced the SVS window value reduces slightly. The 3000 fpm is the max limit for the sensors in the A/P.
The pitot/static system tests and operates normally. The EFIS altitude agrees with autopilot pressure altitude. There are no unusual vertical speed indications on the efis which shares the same pitot/static lines as they are co located close to autopilot.
This unit has 230 hrs on it and according to Bendix/King is no longer serviceable.
Does anyone out there know of a person that may have worked at TruTrak before the company was sold, that may be able to give me some technical guidance on this problem.
Also, does anyone have a TruTrak RV10 or Soccerer autopilot that I can borrow, rent, or purchase to see if the problem lies within my control head?
I think it may be a bad pitot/static sensor in the control head. I put a test set on the aircraft and brought up the airspeed and pressure altitude on the ground to simulate flight and it behaved the same.
Any help would be greatly appreciated!
Thanks,
Mike