Hello All,

I have the GRT Horizon HX dual Ahars in my Legacy.  For the first 30 hours i had absolutely no problems with these units.  After that first 30 hours i took it in for paint and interior and added the second alternator as well as the canopy seal system.  Since then i continually lose ahars #1 within the first five minutes of engine start, and lose ahars#2 within the first hour.  We have done a lot of trouble shooting to look for loose ground and/or power.  The other interesting thing to note is that if turn on the system on the ground without the engine running, I never lose the ahars.  I do have a Vertical Power Vp-200.  I see no voltage or current alarms in the VP-200.

GRT folks seem to think that there might be an interference with the ahars if COAX is close by.  Has anybody experienced anything like this?

Tony Moradian
Legacy L2K330
N444HL