______________________
2.
Damage Check Procedure
A. Electrical Components
____
NOTE : If you find one of these components that is not in the correct R condition, you must replace it with a component with the same P/N R or with an equivalent P/N (Refer to IPC or SM):
-Illuminated push-button switch
-Push-button switch
-Circuit breaker
-Relay base and relay
-Changeover switches (button or toggle)
-Rotary switch
-Limit switch
-Terminal block
-Modular terminal block
-Indicator lights
B. Grounding Module E0425
(1) Table of damage cases
(Ref. Fig. 001)
20-53-54 Page 1
Repair of grounding Modules - Table of Damage cases
E0425
Figure 001
20-53-54 Page 220-53-55 Page 1
____________________________________________________________REPAIR OF TERMINALS AND CONTACTS - DESCRIPTION AND OPERATION
R R R R _______1. General When a terminal or a contact is damaged or broken, the standard repair procedure is to replace it with a terminal or a contact that has the same P/N. This chapter gives the technical requirements of repairs for the terminals and for the contacts.
______________________2. Damage Check Procedure
A. Pre-Insulated Copper Terminals
(1) Layout (Ref. Fig. 001)
(2) Table of damage cases (Ref. Fig. 002)
R (a) Specific case
R R R R R ____NOTE : In case of repair, there is a temporary alternative between E0422 and E0466 terminals. Temporary repair only, so replace the terminal with the basic definition at the subsequent C-check or within 18 months.
B. Post-Insulated Terminals
(1) Layout (Ref. Fig. 001)
(2) Table of damage cases (Ref. Fig. 003) For copper,copalum and aluminum cables.
Repair of Terminals - Layout
Figure 001
20-53-55 Page 2
R Repair of Pre-Insulated Copper Terminal - Table of Damage Cases Figure 002
20-53-55 Page 3
R Repair of Post-Insulated Terminals - Table of Damage Cases Figure 003
20-53-55 Page 4
C. Normal and Coaxial Contacts
(1) Table of damage cases (Ref. Fig. 004)
20-53-55 Page 5
R Repair of Normal and Coaxial Contacts - Table of Damage Cases Figure 004
20-53-55 Page 6
________________________________________________________________
PROTECTION DURING MAINTENANCE CHECKS - DESCRIPTION AND OPERATION
_______
1.
General This chapter gives the protections used on aircraft.
_________________________
2.
Structure of the chapter.
A. Protection by Caps (Ref. 20-54-10).
B. Protection by Sleeves (Ref. 20-54-20).
20-54-00 Page 1
______________________________________________
PROTECTION BY CAPS - DESCRIPTION AND OPERATION
_______
1.
General This chapter gives the different protections that must be installed on connectors (plug and receptacle) during maintenance checks, and in case of equipment disconnection.
_______________
2.
Protective Caps Protective caps are used to prevent contamination or damage to the contacts.
A. Caps for NAS1599 type connectors.
(Ref. Fig. 001)
B. Caps for ARINC type connectors.
(Ref. Fig. 002)
C. Caps for rectangular type connectors.
(Ref. Fig. 003)
20-54-10 Page 1
Protective Caps for NAS1599 Connectors
Figure 001
20-54-10 Page 2
Protective Caps for ARINC Connectors
E0176
Figure 002
20-54-10 Page 3
Protective Caps for RECTANGULAR Connectors
E0680-NSA938424 and NSA938425
Figure 003
20-54-10 Page 420-54-20 Page 1
_________________________________________________PROTECTION BY SLEEVES - DESCRIPTION AND OPERATION
________1. General. This chapter gives an alternative protection which can be used if protective caps are not available.
R R ___________2. Protection. (Ref. Fig. 001) The protection by sleeve or plastic bags must be temporarily used because of the risk of condensation under the sleeve or plastic bags. It is recommended to put a humidity absorber and/or to make a hole in the lower part of the plastic bag to avoid a corrosion phenomenon on the connector.
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