Gmu 44/44B Magnetometer Replacement; Gdc 72 Air Data Computer - Garmin G1000 Line Maintenance Manual

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5.2.6 GMU 44/44B Magnetometer Replacement

Unit Part Number: 011-00870-10 or 011-04201-00
Installation Manual Part Number: 190-00303-10
1. To Remove:
a) Unscrew the three Phillips head screws attaching the GMU to its mounting
rack.
b) Carefully lift the GMU from the rack.
c) Disconnect the wiring harness.
NOTE
The GMU must be mounted such that pitch offset relative to the GRS
mounting is less than 6.0 degrees. Likewise, the roll offset of the GMU
mounting relative to the GRS mounting should also be less than 6.0
degrees. Failure to meet these specifications may result in a failed magne-
tometer calibration. The mounting screws must be brass.
2. To Reinstall:
a) Connect the wiring harness to the GMU.
b) Lower the GMU 44/44B into the rack and secure the plate with the three
screws.
NOTE
If the GMU 44/44B is removed, the anti-rotation properties of the mounting
screws must be restored. This may be done by replacing the screws with
new Garmin P/N 211-60037-08. If original screws must be re-used, coat
screw threads with Loctite 242 (blue) thread-locking compound, Garmin P/
N 291-00023-02, or equivalent.

5.2.7 GDC 72 Air Data Computer

The unit Part Number is 011-03734-00 and the Installation Manual is 190-01855-00
NOTE
When mounting the GDC 72 rack to the airframe, and the unit to the rack, it
is important to make sure that lockdown mechanisms are tight for proper
unit operation.
1. To Remove:
a) Turn the retention screw counterclockwise to disconnect from the remote
rack.
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Page 5-6 LMM for the Kodiak 100
190-02102-00 Rev.4