[Jasonm]

Hi all,
Kind of a dumb question here but I have two yellow alerts on my G3X panel. One is "AHRS Revert" and the other is "ADC Revert" and I cannot figure out why they're there. I will say that I have not yet calibrated my GSU25, could that be why?

Thanks

 

[jthocker]

If you have a G5 in the panel this is normal. The G5 aligns faster than the GSU25, so the G3X "reverts" to the G5's AHRS as a backup until the GSU25 completes its alignment.

 

[Jasonm]

Thanks Jon, I do have a G5 in there.

 

[g3xpert]

Hello Jason,

You may find a description of these two indications on page 332 of the current G3X Touch Pilot's Guide (rev. H).

If a standby flight display is present, and all installed ADAHRS sources are unavailable, the messages ?AHRS REVERT? and ?ADC REVERT? will appear. These messages indicate that the PFD has reverted to using attitude and air data from the standby flight display instead of a dedicated ADAHRS unit.

- Matt