Van's Aircraft - Garmin G3X Installation Manual

C.2

Van's Aircraft

C.2.1 RV-7/9
C.2.1.1 GMU 44 Mounting Bracket
An RV-7/9 GMU 44 Mounting Bracket Kit is available under Garmin part number 011-01796-00, see
Figure C-1. The aft deck was chosen as an installation location, as it provides a level pitch and roll
reference and acceptable separation from excessive magnetic disturbances. The mounting bracket is pre-
drilled to ensure proper alignment with the longitudinal (yaw) axis.
Figure C-1. RV-7/9 GMU 44 Mounting Bracket (115-01027-00)
C.2.1.1.1 GMU 44 Mounting Bracket Installation Guidance
The RV-7/9 GMU 44 Mounting Bracket can be installed on the F-714 aft deck forward of the horizontal
stabilizer. Prior to installing the mounting bracket on the aft deck, the GMU 44 mounting plate
(115-00481-00) should be riveted to the mounting bracket. When riveting the mounting plate to the
bracket, ensure that the "Forward" arrow is pointing towards the front of the airplane and is parallel to the
longitudinal axis of the aircraft. As shown in Appendix E, the mounting plate should be attached to the
bracket with the supplied AN426AD5-6 rivets.
The GMU 44 mounting bracket outer dimensions are used for alignment. To minimize
inadvertent misalignment caused by edge alteration, it is recommended that the installer
NOT deburr the edges of the GMU 44 mounting bracket.
After the GMU 44 mounting plate has been installed on the mounting bracket, the following procedure
should be followed to attach the mounting bracket to the F-714 aft deck:
1. Draw a centerline down the middle of the F-714 aft deck.
2. Place the GMU 44 mounting bracket on the F-714 aft deck (see Figure C-2).
3. Slide the GMU 44 mounting bracket forward, ensuring the front edge is against the vertical
portion of the F-714 aft deck (see Figure C-2).
It is vital that the front edge be squarely positioned against the flange. The GMU 44 rack
alignment points are based on the mount being perpendicular to the flange. The inner
edge should be aligned with the centerline on the fuselage.
Page C-2
Revision E
NOTE
NOTE
G3X Installation Manual – Airframe Specific Installation Guidance
190-01115-01