Garmin G3X Installation Manual page 790

A.3.2 Lancair ES/ES-P
A.3.2.1 GMU 22 Mounting Bracket
The Lancair ES/ES-P uses the G3X generic GMU 22 mount. The mount is comprised of two sheet metal
parts, a bottom bracket (Garmin part number 115-00939-00) and a top bracket (Garmin part number
115-01017-00) that holds the GMU 22 mounting plate. The set is purchased as a sub-assembly kit under
Garmin part number 011-01779-00.
A.3.2.1.1 GMU 22 Mount Installation Guidance
One possible mounting location for the GMU 22 is the last wing rib in the right wingtip (refer to
Figure A-7). The wing tip should be removable to gain proper access to the GMU 22. At a minimum, a
removable access panel under the wingtip is required.
The GMU 22 is removed by lifting the unit up and out, the entire bracket assembly would need to be
unscrewed from the rib in order to service it from underneath. Considerations for both GMU 22 bracket
attachments and wingtip attachments should be made to ensure access to the GMU 22.
• The GMU 22 Installation Rack (115-00481-X0) should be installed parallel to the
mounting surface of the Magnetometer Bracket (115-01017-00) to ensure the finished
GMU 22 installation will be in alignment with the Lancair ES/ES-P aircraft heading.
• The GMU 22 Installation Rack (115-00481-X0) should be installed with the forward
arrow (marked on the ring) indicating a direction parallel with the outboard wing rib,
which acts as a reference for the aircraft's forward direction.
NOTE
There are two small alignment holes on the GMU 22 bracket and a "V" cut into the
GMU 22 Installation Rack. Temporarily placing a drill bit in this hole will aid in making
a perfectly parallel alignment of the GMU 22.
190-01115-01 G3X/G3X Touch Installation Manual - Airframe Specific Installation Guidance
Rev. AA
Figure A-7 Right Wingtip GMU 22 Installation
Page A-7