Small Tip: When upgrading the databases - check the cycle number of each panel BEFORE takeoff, just in case it didnt happen first time
I needed to update the GPS database in flight - cos if they dont match between the panels - they dont want to talk to each other. Since I was near the airfield I took the descision to "upgrade" in the air. (Knowing i could get down quickly if it went wrong
). Powering off the PFD is harder than you think (see previous posts).
The AHRS requires you to fly straight and level - ish (using the AI) and will then recover - i am not sure of the exact algorithm but I think they use more that just the gyros - the magnetic system plays a part. I must admit I have
not tried to confuse it by resetting at an adverse attitude. It knows if you are off balance on the gound so I assume it will do the same in the air.
I am now going to hide.