Instruction Manual

G1000 / GFC 700 System Maintenance Manual - 300/B300 Series King Air Page 6-9
190-00716-01 Revision 4
6.13 GCU 477
Removal:
1. Use a 3/32” hex drive tool to turn each of the four locking sockets ¼ turn counterclockwise until
they reach their stops.
2. Disconnect backshell assembly from unit.
Reinstallation:
1. Inspect connector(s) for damaged pins.
2. Connect backshell assembly to unit.
3. Hold unit flush with the pedestal, ensuring locking stud alignment marks are in the vertical
position.
4. Use a 3/32” hex drive tool to turn each of the four locking sockets ¼ turn clockwise. This may
require applying a small amount of forward pressure to engage the ¼ turn sockets.
5. Configure and test the GCU 477 according to Section 7.10.
6.14 GMC 710
Removal:
1. Use a 3/32” hex drive tool to turn each of the four locking sockets ¼ turn counterclockwise until
they reach their stops.
2. Disconnect backshell assembly from unit.
Reinstallation:
1. Inspect connector(s) for damaged pins.
2. Connect backshell assembly to unit.
3. Hold unit flush with the mounting bracket, ensuring locking stud alignment marks are in the
vertical position.
4. Use a 3/32” hex drive tool to turn each of the four locking sockets ¼ turn clockwise. This may
require applying a small amount of forward pressure to engage the ¼ turn sockets.
5. Configure and test the GMC 710 according to Section 7.11.
6.15 GWX 68 or GWX 70
Removal:
1. Gain access by removing nose radome.
2. Disconnect backshell assembly from unit.
3. Use a 3/16” hex drive tool to remove each of the four mounting screws.
Reinstallation:
1. Inspect connector for damaged pins.
2. Hold unit flush with the radar mount.
3. Use a 3/16” hex drive tool to tighten each of the four mounting screws.
4. Connect backshell assembly to unit.
5. Configure and test the GWX 68 or GWX 70 according to Section 7.12.1.