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G1000 System Maintenance Manual
Page 7-13
190-00903-00
Rev.
A
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.
g.
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.
h.
Press the ENT key on the PFD. Repeat steps 1 through 4 for GRS 77 #2.
Procedure B: Magnetometer Calibration
Figure 7-4. Magnetometer Calibration
Calibration Procedure B must be performed for both GRS/GMU installation pairs installed in the
aircraft. Calibration Procedure A1 must be successfully completed prior to attempting this
procedure. Calibration Procedure B must be carried out on a calibrated compass rose in order to
guarantee measurements free of environmental magnetic disturbances. Attempting to carry out
this maneuver on a typical ramp area will not yield a successful calibration.
