Garmin G1000 NAV III Line Maintenance Manual page 148

This first procedure must be carried out with the engine off.
1. Level the aircraft to 2° pitch nose up and wings level.
2. Initiate the AHRS Ground Pitch/Roll Aircraft Level compensation mode by performing the following
steps:
a) Enter Configuration Mode and go to GRS/GMU CALIBRATION page as shown in Figure 4-6.
b) This page is protected and requires a keystroke password to perform the calibration. Press the
following softkeys in sequence:
i) softkey 9
ii) softkey 10
iii) softkey 11
iv) softkey 12
c) Ensure that the No. 1 GRS 77 is selected.
d) Select PITCH/ROLL OFFSET, then press the ENT key.
e) Follow the checklist items displayed on the PFD and press the ENT key as each one is completed
or confirmed. When the CALIBRATE field is blinking, press the ENT key to begin the
procedure.
f) After several seconds, a new checklist appears in the lower half of the PFD. Press the ENT key
as each item is confirmed. When the CONFIRM AIRCRAFT IS LEVEL field is blinking, press
the ENT key to continue.
3. The result of the pitch/roll offset compensation is displayed on the PFD. If successful, the AHRS records
the required pitch and roll offsets, informs the operator of a successful conclusion and returns to normal
operation.
4. Press the ENT key on the PFD to conclude this procedure.
Page 4-22
Rev. L
G1000 Nav III Line Maintenance Manual
190-00352-00