Garmin G3X Installation Manual page 223

C.3.2 Lancair ES/ES-P
C.3.2.1 GMU 44 Mounting Bracket
The Lancair ES/ES-P uses the G3X generic GMU 44 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 44 mounting plate. The set is purchased as a sub-assembly kit under
Garmin part number 011-01779-00.
C.3.2.1.1 GMU 44 Mount Installation Guidance
One possible mounting location for the GMU 44 is the last wing rib in the right wingtip (refer to Figure
C-7). The wing tip should be removable to gain proper access to the GMU 44. At a minimum, a
removable access panel under the wingtip is required.
The GMU 44 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 44 bracket
attachments and wingtip attachments should be made to ensure access to the GMU 44.
•
The GMU 44 Installation Rack (115-00481-00) should be installed parallel to the mounting
surface of the Magnetometer Bracket (115-01017-00) to ensure the finished GMU 44 installation
will be in alignment with the Lancair ES/ES-P aircraft heading.
•
The GMU 44 Installation Rack (115-00481-00) 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.
There are two small alignment holes on the GMU 44 bracket and a "V" cut into the
GMU 44 Installation Rack. Temporarily placing a drill bit in this hole will aid in making
a perfectly parallel alignment of the GMU 44.
G3X Installation Manual – Airframe Specific Installation Guidance
190-01115-01
Figure C-7. Right Wingtip GMU 44 Installation
NOTE
Page C-7
Revision E