190-01115-01
G3X/G3X Touch Install Manual - GDU 4XX Config and Post Install Checkout
Rev. AC
Page 34-22
For each Calibration Procedure, Table 34-5 lists the LRUs that require valid calibration data.
Table 34-6 lists the type of valid calibration data required to be output by each LRU for the Calibration
Procedures listed in Table 34-5.
The Magnetometer Configuration Page status boxes referred to in Table 34-5 and Table 34-6 are shown in
the following figure.
If removal and replacement of a GMU magnetometer unit is required after post-installation calibration has
been completed, the GMU 22 mounting rack or GMU magnetometer must not be moved. If the mounting
screws that secure the GSU 25/GSU 73 unit or the GMU magnetometer mounting rack are loosened for
any reason, post-installation calibration procedures, ADAHRS Unit Orientation (
),
Pitch/Roll Offset Compensation (
), ADAHRS Static Pressure Calibration
(
), and GMU 11 Orientation (
) must be repeated before the aircraft can be
returned to service.
Table 34-5 Data Validity Requirements for Magnetometer Calibration Procedures
Magnetometer Calibration
Procedure
Valid Status Required for
GSU 25 and GMU
Calibration
Valid Status Required for
GSU 73 and GMU Calibration
GMU 11 Mounting Orientation
Identification (if applicable)
None
None
(GMU 11 is not supported by
GSU 73)
Magnetometer Interference Test
None
GPS or Air Data
Magnetometer Calibration
GPS
Air Data and GPS
Table 34-6 Configuration Mode Magnetometer Page Status Boxes
Status Box
Valid Status
Magnetometer
Magnetometer LRU status valid
GPS Data
3D or 3D Differential GPS solution available
Air Data
True Airspeed (TAS) available. NOTE: A valid outside air temperature (OAT)
measurement is required for TAS to be valid.
Attitude (if
applicable)
Magnetometer is receiving valid attitude data from ADAHRS
