Table 7-10, Required Grs/Gmu Calibrations - Garmin G1000 Nxi System Maintenance Manual

Condition
Either GMU 44 was removed and
reinstalled. (no change in serial number)
GMU 44 was replaced with new unit.
(New serial number)
GRS AHRS or GSU ADAHRS was removed
and/or replaced. The mounting tray was
NOT removed and the mounting tray bolts
were NOT loosened.
GRS AHRS or GSU ADAHRS was removed
and/or replaced. The mounting tray WAS
removed and/or mounting tray bolts WERE
loosened.
GRS AHRS or GSU ADAHRS Configuration
Module was replaced.
Procedure A1: GSU 75B, GRS 77, or GRS 7800 Pitch/Roll Offset
Calibration
This procedure must be performed for both GSU/GRS units installed in the aircraft. This first
procedure must be carried out with the engine off.
1. Level the aircraft to within ±0.25° of zero pitch and zero roll using a digital level. (Follow
instructions in King Air 300 Series Maintenance Manual, listed in Table 1-1, for leveling)
2. Start PFD 1 in Configuration mode.
3. Go to the GRS Page Group and select the GRS/GMU Calibration page at the PFD. This
page is protected and the following softkey password must be entered at the PFD to
continue:
•
9
•
10
•
11
•
12 (Far Right softkey)
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1

Table 7-10, Required GRS/GMU Calibrations

Procedure A1:
GSU 75B,
GRS 77, or
GRS 7800
Pitch/Roll
Offset
Calibrations Required
Procedure B:
GSU/GRS/GMU
Magnetic
Calibration
None Required.
Continue to GSU/GRS/GMU Test Section.
X
None Required.
Continue to GSU/GRS/GMU Test Section.
X X
X X
Procedure D:
Engine Run-up
Vibration
Test
X
X
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