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Thread: AFS 5600 AHRS Problem

  1. #1

    AFS 5600 AHRS Problem

    I have been having problems with the AHRS in my AF-5600 EE Serial #71112

    History / Symptoms:
    1. May 2012 - Buy AFS 5600. Couple years later to complete build.
    2. Nov 2014 - AHRS Hard failure diagnostic during initial engine checkout on ground - Sent back to AFS for AHRS replacement.
    3. Dec 2014 - Reinstall and checkout - Notice wild full scale "ball" swings back and forth during idling on ramp
    4. Jan 2015 - Horizon and ball both indicate about a 1 degree bank to right on level surface (not running).
    5. Mar 2015 - First Flight
    6. Apr 2015 - Get up into some smooth air ... ball still wanders a bit but not as bad as before. One ball back and forth.
    7. Current status - 1/4 ball offset and 1 deg roll indication when plane is level and ball wanders in flight.

    Please let me know what you think and any suggestions.
    Thanks.

  2. #2
    Interesting... I have a similar experience with my AF5600s. I didn't have an AHRS failure, but the balls on my units wander back and forth in smooth air. I have a D10A and the ball on it is rock solid, so I know it isn't my flying! Also, both of my units have the internal AHRS, and the balls swing on both and don't match. I have units 71038 and 71045. I've spoken to tech support about getting to the bottom of the issue, but I'm currently battling a Vertical Power issue, so the airplane is grounded.

  3. #3
    The ball wanders sometimes on my 5600, but is OK on the 4500.

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