To exchange an LRU
7-6 Chapter 7: Maintenance and troubleshooting 98-145168-A
7.4.5 Removal and re-installation of the SCM (SCM-5055)
1. Ensure that power is removed from the SATCOM system before removing the SCM.
2. Release the screw-locks on the D-sub connector and remove the 15 pin D-sub connector
from the SCM.
3. Remove the four fasteners holding the SCM in place through its mounting flange.
Re-installation
1. Mount the SCM to the aircraft structure with the four fasteners through its mounting
flange.SCM.
2. Connect the 15 pin D-sub connector to the SCM and tighten the connector screw-locks
to 0.32 Nm.
7.4.6 Removal and re-installation of the HELGA (LGA-5005)
Refer to the LGA-5005 HELGA installation manual [8].
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