Page 3-28 G1000 V8.XX S/W Load and Post Install Checkout – Columbia 350/400
Revision 1 190-00577-04
3. Verify that the Rate of Climb reported by the Vertical Speed field on the PFD is within the
tolerances specified in the table below:
Vertical Speed, feet/minute Allowed tolerance, ±feet/minute
2000 100
1000 50
500 45
200 45
0 45
-200 45
-500 45
-1000 50
-2000 100
3.9.3 OAT Probe Check
Check the outside air temperature (OAT) measurement shown on the PFD to ensure it reads ambient
temperature.
3.10 GRS 77/GMU 44 Initial Alignment
The GRS 77 AHRS unit and the GMU 44 magnetometer unit require calibration before first flight. There
are three procedures to be carried out. The aircraft engine must be started after the first procedure is
complete. When ready to perform the procedures, shut the PFD and MFD off by pulling the PFD and
MFD circuit breakers. Restart both displays in configuration mode.
3.10.1 GRS 77 Pitch/Roll Offset Calibration
Figure 3-6. Pitch/Roll Offset
This procedure must be carried out with the engine off. Rotate the large FMS knob to select the GRS
page group on the PFD. Rotate the small FMS knob clockwise to access the GRS/GMU calibration page
on the PFD.
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