Example of Marking of Unions
Figure 201/TASK 20-23-22-991-001
1EFF : ALL 1 20-23-22 Page 203
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Subtask 20-23-22-918-051
B. Crew Oxygen System
(1) Clean the surface to be marked with CLEANING AGENTS (Material No. 11-005).
NOTE : If you install components again, you must remove the old red____ line before you apply a new red line.
R R R R (2) Make a mark on the union with one 2 mm (0.0787 in.) to 4 mm (0.1574 in.) wide line with STRUCTURE PAINTS (Material No. 16-003) or PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-020) (red color) applied with a brush. Let dry.
5. Close-up________
Subtask 20-23-22-869-051
A. Make sure that the work area is clean and clear of tool(s) and other items.
INSTALLATION AND REPAIR OF WATER AND AIR SUPPLY TUBING - MAINTENANCE PRACTICES
______________________________________________________________________________
TASK 20-23-38-000-001
Removal of the Tubes of the Potable Water and the Air Supply System
NOTE : The procedure is the same for both the potable and the air supply
____
system.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking plugs
No specific chipless cutter
No specific container
No specific warning notice
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-24-38-680-001 Draining of the Potable Water System (with Electrical Power)
20-23-38-300-001 Repair of the Tubes Assembly of the Potable Water and the Air Supply System to be carried out in the Workshop
20-23-38-300-002 Repair of the Tubes of the Potable Water and the Air Supply System to be carried out in the Aircraft R 20-23-38-300-048 Repair of the Tubes with H-Fittings to be carried out in the Aircraft 20-23-38-300-049 Temporary Repair of the Tube Assemblies with MS21922 Sleeves to be carried out in the Workshop 24-42-00-861-001 Energize the Ground Service Network from the External Power 30-73-53-000-001 Removal of the Potable-Water De-icing Heater Elements
(4DW, 5DW, 6DW, 9DW)
38-10-00-614-002 Depressurization of the Potable Water System
20-23-38-991-015 Fig. 201
20-23-38-991-037 Fig. 202
20-23-38-991-004 Fig. 203
3. Job Set-up
__________ Subtask 20-23-38-861-053
A. Energize the ground service network
(Ref. TASK 24-42-00-861-001)
Subtask 20-23-38-010-061
B. Get Access
(1) Remove/open the relevant access panels/doors to get access to the repair area.
Subtask 20-23-38-860-059
C. Aircraft Maintenance Configuration
(1)
Make sure that the water system is the depressurized before maintenance action (Ref. TASK 38-10-00-614-002).
(2)
Make sure that the potable water system is emptied before maintenance action (Ref. TASK 12-24-38-680-001).
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