190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 4-8
4. Measure the resistance between the mounting rack and the instrument panel, and verify that it is
less than or equal to 10 mΩ.
In the event of bonding test failure, remove the GMA 35 rack and clean the attachment points with a
bonding brush at both the rack and the aircraft attachment points. Re-verify the resistance between the
mounting rack and the instrument panel and ensure that the resistance is less than or equal to 5 mΩ.
5. Re-install the backplate assembly and re-install the GMA unit in the mounting rack.
4.5.5 Flight Stream 210 Bonding Check (Metallic or Tube-and-Fabric Aircraft)
1. Disconnect the shield terminations from the Flight Stream connector backshell.
2. Measure the resistance between the connector and nearby exposed portion of aircraft metallic
structure and check that it is less than or equal to 20 mΩ.
In the event of bonding test failure, remove the Flight Stream 210 connector bonding strap from the aircraft
ground plane and clean the attachment point with a bonding brush. Re-attach the bonding strap to the
aircraft ground plane, and torque to 12 to 15 in-lbf. Measure the resistance between the Flight Stream 210
connector and aircraft structure, ensuring that the resistance is less than or equal to 10 mΩ. If cleaning the
far side of the strap is not enough, remove, clean, and re-attach on the Flight Stream 210 side.
3. Connect the shield terminations to the Flight Stream 210 connector backshell.
4.5.6 Flight Stream 210 Bonding Check (Composite Aircraft)
1. Disconnect the shield terminations from the Flight Stream 210 connector backshell.
2. Measure the resistance between the connector and instrument panel (or other aircraft ground) and
check that it is less than or equal to 20 mΩ.
In the event of bonding test failure, remove the Flight Stream 210 connector bonding strap from the aircraft
ground plane and clean the attachment point with a bonding brush. Re-attach the bonding strap to the
aircraft ground plane, and torque to 12 to 15 in-lbf. Measure the resistance between the Flight Stream 210
connector and aircraft ground, ensuring that the resistance is less than or equal to 10 mΩ. If cleaning the far
side of the strap is not enough, remove, clean, and re-attach on the Flight Stream 210 side.
3. Connect the shield terminations to the Flight Stream connector backshell.