Data Validity Requirements For Ahrs Calibration; Configuration Mode Ahrs Page Status Boxes - Garmin G3X Installation Manual

For each Calibration Procedure, Table 31-2 lists the LRU's that require valid calibration data.
Table 31-2 Data Validity Requirements for AHRS Calibration Procedures
AHRS Calibration Procedure
AHRS Mounting Orientation
Identification
Pitch/Roll Offset
Magnetometer Calibration
Engine Run-Up
Magnetometer Interference Test
ADAHRS Static Pressure
Calibration
Table 31-3 lists the type of valid calibration data required to be output by each LRU for the Calibration
Procedures listed in Table 31-2.
Table 31-3 Configuration Mode AHRS Page Status Boxes
Status Box
Magnetometer Measurement of local 3D magnetic field available
True Airspeed (TAS) available. NOTE: A valid outside air temperature (OAT)
Air Data
measurement is required for TAS to be valid.
GPS 3D or 3D Differential GPS solution available
The AHRS Configuration Page status boxes referred to in Table 31-2 and Table 31-3 are shown in the
following figure.
If removal and replacement of a GMU 22 unit is required after post-installation calibration has been
completed, the GMU 22 mounting rack must not be moved. If the mounting screws that secure the
GSU 25/GSU 73 unit or the GMU 22 mounting rack are loosened for any reason, post-installation
calibration procedure, A, B, D and E must be repeated before the aircraft can be returned to service.
Any GMU 22 removal or replacement requires repeating the magnetometer calibration.
A repeat of the pitch/roll offset procedure (Procedure B) requires a repeat of the magnetometer calibration
procedure (Procedure D).
190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install Checkout
Rev. AA
Valid Status Required for
GSU 25 Calibrations
None
None
GPS and Magnetometer
None
Magnetometer
None
Valid Status
Valid Status Required for
GSU 73 Calibrations
None
GPS and Air Data
Air Data, GPS, and
Magnetometer
GPS or Air Data
GPS or Air Data. Magnetometer
always required.
None
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