Trim indicator

[barbeau]

Hi
I'm writing from france.
I am flying an ultra light aircraft Dynamic WT9 (LSA in US), with D100 and AP74.
Aircraft flying straight, properly trimed, as soon as I engage AP (altitude old mode) the trim indicator appear DWN. In order to switch off the trim indicator I have to trim the nose down. But as soon as I disengaged AP, aircraft is puting nose aircraft down.
Do you have any solutions?
Best regards
Bernard Barbeau

 

[dynonsupport]

If you can disconnect the servo from the aircraft linkage, so it it can spin free, and then engage the AP on the ground, does the trim indication come back once the servo stabilizes?

 

[barbeau]

Hi
As you advise, I disconnect the servo from the aircraft. Engaging the AP, trim indicatour come back to DWN. I have to said that servo continue to move a bit one way and back very fast and time to time. It looks like more a vibration than a displacement, and it sound.
As I understand, servo send bad information to D100?
Why the servo does not stabilize totaly?
Your advise to fix it? Servo replacement ?
Many thanks in advance.
Best regards
Bernard Barbeau

 

[dynonsupport]

The back and forth is normal, but the trim down indication is not. It sounds like a bad servo. Give technical support a call at 425-402-0433 or an email at support at dynonavionics dot com.