Gps Antenna; Gmu 11 - Garmin G5 Maintenance Manual

6.4 GPS Antenna

Refer to the data which installed the GPS antenna for removal and installation of the GPS antenna. If a
glareshield antenna is installed, refer to the Garmin G5 Electronic Flight Instrument Part 23 AML STC
Installation Manual, 190-01112-10 section 4.

6.5 GMU 11

CAUTION:
When removing and/or installing the GMU11, always ensure that aircraft power is off. Unplug
any auxiliary power supplies.
Removal
1. Gain access to the GMU 11. Refer to the location information recorded in APPENDIX B of this
document and maintained with the aircraft records.
2. Disconnect the GMU 11 connector.
3. Unscrew the 4 fasteners that hold the GMU 11 to the mounting location.
NOTE
Make sure the hardware removed from the GMU 11 mounting is retained for reinstallation. If hardware
needs to be replaced, reference Figure 6-4 for appropriate Hardware part numbers.
NOTE
Be sure to use non-magnetic tools to avoid harming the GMU.
Reinstallation
1. Place the GMU 11 in its mounting location and align its holes with the mounting holes.
2. Insert the 4 mounting screws and secure the GMU 11 in place with washers and nuts. Tighten
screws until snug, plus 1/4 turn.
3. Inspect the electrical connector and pins for signs of damage. Repair any damage.
4. Connect the wiring harness to the GMU 11.
5. Conduct the Magnetometer calibration procedure (Section 7.5.3), the Compass Rose Swing
(Section 7.6 ) and the Magnetic interference check (Section 7.8.1).
Garmin G5 Electronic Flight Instrument Part 23 AML STC Maintenance Manual
Page 26 of 54
190-01112-11
Rev. 7