R ____________________3. General Requirements
R ____NOTE : Only one repair is permitted per two meters length for total length
R of the protected harness. Beyond this limit, whatever the type of
R damage, replace the bundle protection and/or the harness.
R ____NOTE : Repair classsification can change depending on the location and the
R system of the harness.
R Protected harnesses used for flight control system (identified by
R pink labels) or in movement (hinge or equivalent) must be changed. In
R case of repair, the repair is grade 3.
R However, those protected by braided conduits or overbraided can be
R repaired and the repair is grade 2.
R ______________________________________4. Structure of the Chapters that follow:
A. Repair of Convoluted Conduits (Ref. 20-53-31)
B. Repair of Metallic Conduits (Ref. 20-53-32)
R C. Repair of Miscellaneous Conduits (Ref. 20-53-33)
R D. Repair of Heat Shrink Conduits (Ref. 20-53-34)
R
_________________________________________________________REPAIR OF CONVOLUTED CONDUITS - DESCRIPTION AND OPERATION
_______1. General
R
This chapter describes the methods for the repair of convoluted conduits
related to the degree of damage.
R The convoluted conduits installed on aircraft for the wire harness
R protection have the codes that follow:
R E0432,
R NSA935805,
R NSA935806.
R
R The standard procedure is to replace damaged or broken items (bundle
R protection or full protected harness for overbraided conduit) by new items
R with the same P/N.
______________________2. Damage Check Procedure
A. Conduit layout
(Ref. Fig. 001)
B. Table for damage assessment
R
(Ref. Fig. 001)
R
R C. When the repair is selected refer to para 3 : Repair Procedure for the
R general description and condition of application.
R ________________3. Repair Procedure
R
This paragraph gives the general description and conditions of application
for each repair type.
R ____NOTE : Repair classification can change depending on the location and the
R system of the harness (Refer to chapter 20-53-30 para. General
R Requirements).
R
(Ref. Fig. 002, 003, 004, 005, 006, 007)
____NOTE : Repair classification: Refer to chapter: Wire protection repair -
20-53-30
R Repair of Convoluted Conduits - Layout and Table for Damage Assesments E0432,NSA935805 and NSA935806 Figure 001
20-53-31 Page 2
R Repair of Convoluted Conduits - Layout and Table for Damage Assesments E0432,NSA935805 and NSA935806 Figure 002
20-53-31 Page 3
R Repair of Convoluted Conduits - Layout and Table for Damage Assesments E0432,NSA935805 and NSA935806 Figure 003
20-53-31 Page 4
R Repair of Convoluted Conduits-Damage Cases and Repair Scheme E0432,NSA935805 and NSA935806 Figure 004
20-53-31 Page 5
R Repair of Convoluted Conduits-Damage Cases and Repair Scheme E0432,NSA935805 and NSA935806 Figure 005
20-53-31 Page 6
R Repair of Convoluted Conduits-Damage Cases and Repair Scheme E0432,NSA935805 and NSA935806 Figure 006
20-53-31 Page 7
R Repair of Convoluted Conduits-Repair Principle E0432,NSA935805 and NSA935806 Figure 007
20-53-31 Page 820-53-32 Page 1
_______________________________________________________REPAIR OF METALLIC CONDUITS - DESCRIPTION AND OPERATION
_______1. General
R
This chapter describes the methods for the repair of metallic conduits
related to the degree of damage. The metallic conduits installed on aircraft
are divided into 3 sub-families and have the codes that follow:
- Metallic tubes:
NSA3625
- Screened convoluted conduits:
. Without halar sheath:
ABS0330
ABS0492
ABS0631
R ABS0887B
E0469
E0560
NSA935805T
NSA935806T or S
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