TASK 20-23-38-300-048
R Repair of the Tubes with H-Fittings to be carried out in the Aircraft
NOTE : The procedure is the same for both the potable water and the air supply
____
system.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific chipless cutter
No specific container
No specific deburring tool
No specific warning notice
B. Consumable Materials
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REFERENCE DESIGNATION
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Material No. 11-003 USA ASTM D 740
METHYL-ETHYL-KETONE (Ref. 20-31-00)
C. Referenced Information
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REFERENCE DESIGNATION
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12-15-38-613-001 Fill the Potable Water Tank System (Aircraft Electrical Power Available) 12-24-38-680-001 Draining of the Potable Water System (with Electrical Power) 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
30-73-53-400-001 Installation of the Potable-Water De-icing Heater
Elements (4DW, 5DW, 6DW, 9DW)
38-10-00-614-001 Pressurization of the Potable Water System from a
Ground Air Supply
38-10-00-614-002 Depressurization of the Potable Water System
38-10-00-670-002 Sterilization of Water Tank and Distribution System
38-41-00-790-001 Leak Check of the Components in the Air Supply System
20-23-38-991-037 Fig. 202
20-23-38-991-004 Fig. 203
20-23-38-991-005 Fig. 207
20-23-38-991-026 Fig. 217
20-23-38-991-038 Fig. 228
20-23-38-991-039 Fig. 229
3. Job Set-up__________
Subtask 20-23-38-861-052
A. Energize the ground service network (Ref. TASK 24-42-00-861-001) Subtask 20-23-38-010-054
B. Get Access
(1) Open/remove the relevant access panels/doors to get acess to the repair area.
Subtask 20-23-38-860-055
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).
1EFF : ALL 1 20-23-38Page 257 1 1 May 01/05R 1 1 1CES 1
Subtask 20-23-38-941-058
D. Safety Precautions WARNING : MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A
_______ PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.
WARNING : MAKE SURE THAT THE EQUIPMENT YOU USE FOR THIS PROCEDURE IS
_______ CLEAN AND APPROVED FOR THE POTABLE WATER SYSTEM. IF NOT IT CAN CAUSE CONTAMINATION OF THE POTABLE WATER SYSTEM.
(1) Put a warning notice in position to tell personnel not to fill or pressurize the potable water system.
4. Procedure
_________ Subtask 20-23-38-941-061
A. Put a container below the potable water line to collect the unwanted water.
Subtask 20-23-38-350-052
B. Removal of the Damaged Tube Section
WARNING : MAKE SURE THAT THE WATER TANK IS DEPRESSURIZED.
_______
WARNING : MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A
_______ PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.
WARNING : MAKE SURE THAT THE EQUIPMENT YOU USE FOR THIS PROCEDURE IS
_______ CLEAN AND APPROVED FOR THE POTABLE WATER SYSTEM. IF NOT IT CAN CAUSE CONTAMINATION OF THE POTABLE WATER SYSTEM.
(1) Cut and Deburr the Damaged Tubing
(a) Use a chipless cutter and a deburring tool (Ref. Fig. 203/TASK 20-23-38-991-004, 207/TASK 20-23-38-991-005)
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