Instruction Manual

Page 6-6 G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air
Revision 8 190-00915-01
For Horizontal Stabilizer Location (left or right side):
Removal:
1. Remove inspection access panel (second from inboard) from lower side of the horizontal
stabilizer to gain access to the GMU electrical wiring harness.
2. Disconnect GMU pigtail harness from the electrical wiring harness.
3. Remove the screws and flux valve access cover from the upper side of horizontal stabilizer.
4. Mark the orientation of the GMU adapter plate assembly to the flux valve mounting dish.
5. Remove three screws/washers connecting the GMU adapter plate assembly to the flux valve
mounting dish.
6. Remove three screws connecting the GMU to the GMU adapter plate assembly.
7. If the unit is to be replaced, remove cable ties attaching the phenolic wire guard to the unit and
retain the wire guard and grommet from the pigtail harness.
Reinstallation:
1. Visually inspect the connectors to ensure there are no bent or damaged pins. Repair any damage.
2. Reinstall the three screws attaching the GMU to the GMU adapter plate assembly.
3. If a new GMU is installed, use two MS3367-7-1 cable ties through the retained phenolic wire
guard to secure the guard and connector harness to the GMU.
4. Ensure the MS35489-4 grommet is installed on the unit pigtail harness and secured in the slot in
the aft side of the GMU adapter plate assembly.
5. Use the orientation marks on the GMU adapter plate assembly to align the adapter plate assembly
to the flux mounting dish and reinstall the three screws/washers attaching the adapter plate.
6. Ensure there is a gap of at least 0.2 inch between the unit pigtail harness and the flux valve access
cover.
7. Reinstall the screws and flux valve access cover on the upper side of horizontal stabilizer.
8. Connect the GMU pigtail harness to the electrical wiring harness.
9. Reinstall the inspection access panel (second from inboard) on the lower side of the horizontal
stabilizer.
10. Calibrate and test the GMU 44 according to Section 7.7.
6.10 GDL 69A
Removal:
1. Gain access by removing the right side GDU 1040A display unit (see Section 6.1.)
2. Unlock the GDL 69A handle by loosening the Phillips screw on the handle.
3. Pull the handle upward to unlock the GDL 69A. Gently remove the unit from the rack.
Reinstallation:
1. Visually inspect the connectors to ensure there are no bent or damaged pins. Repair any damage.
2. Gently insert the GDL 69A into its rack. The handle should engage the dogleg track.
3. Press down on the GDL 69A handle to lock the unit into the rack.
4. Lock the handle to the GDL 69A body using the Philips screw.
5. Configure and test the GDL 69A according to Section 7.8.