Typically the 76 has about a 3 degree nose down attitude on the AH. That figures well to what the attitude of the aircraft is in fwd flight.
I consider it foolish to mess with the AH in flight. Set it on the ground while the aircraft is laterally level and leave it be. Be wary that while flying oleo equipped machines that unequal compression of the oleos will create an error.
On the EFIS helos the AH was constantly leaning. You eventually learned to crosscheck with your Standby and have a glance at the other sides attitude to help diagnose the problem.
