Garmin G900X Installation And Maintenance Manual page 483

C.2.15 GRS 77/GMU 44 Alignment and Calibration
The GRS 77 initial alignment procedure can be skipped if the GRS 77 mounting rack is
level to within 0.25 degrees of the aircraft level reference.
Perform the GRS 77/GMU 44 Initial Alignment procedure and the Final GRS 77/GMU 44 Calibration
Procedures as described in Section 15.4.3.
C.2.16 Piston Engine Indication System Verification
On the MFD, check the indication for each of the sensor or monitor inputs with the aircraft engine off. At
the appropriate EIS section, observe the following sensor indications (see Figure C-19, C-20, and C-21).
G900X/G950 Installation and Maintenance Manual – PICP & Warranty Registration
190-00719-00
NOTE
Page C-39
Revision D