woodsideraff
Well Known Member
We have the GMU 22 magnetometer mounted in the left wing per Vans' specifications.
At first, we couldn't pass the magnetometer interference tests for landing light and strobes. This issue was resolved by bringing the ground return from both landing light and nav/strobes back to the fuselage, thus eliminating the currents through the aluminum fuselage.
However, we are still getting a warning signal on the display: "AHARS 1 magnetic anomaly - check installation". I suspect there are still some stray fields generated by the electrical equipment in the wing.
I believe this to be more of a nuisance than actual magnetometer failure, since the mag heading indications don't seem to be affected.
Has anyone else observed this behavior?
At first, we couldn't pass the magnetometer interference tests for landing light and strobes. This issue was resolved by bringing the ground return from both landing light and nav/strobes back to the fuselage, thus eliminating the currents through the aluminum fuselage.
However, we are still getting a warning signal on the display: "AHARS 1 magnetic anomaly - check installation". I suspect there are still some stray fields generated by the electrical equipment in the wing.
I believe this to be more of a nuisance than actual magnetometer failure, since the mag heading indications don't seem to be affected.
Has anyone else observed this behavior?