A. Repair of the Tube Assembly WARNING : MAKE SURE THAT THE POTABLE WATER SYSTEM IS DEPRESSURIZED. A
_______ PRESSURIZED SYSTEM CAN CAUSE INJURY TO PERSONS WHEN THEY DO WORK ON IT.
(Ref. Fig. 219/TASK 20-23-38-991-001)
Use this approved procedure to repair tubes made of 21.6.9
corrosion-resistant steel.
NOTE : You can use the PERMASWAGE repair procedure to repair the tubes
____
installed with HARRISON fittings.
Swage Principle
Figure 219/TASK 20-23-38-991-001
1EFF : ALL 1 20-23-38 Page 237
1 1 May 01/98
1 1
1CES 1
There are two types of PERMASWAGE fittings:
-permanent,
-separable (that you can remove). The table below gives the standards for the swaged fittings that are available.
-------------------------------------------------------------------------------
PERMANENT FITTINGS SEPARABLE FITTINGS SLEEVE AND NUT -------------------------------------------------------------------------------ABS0335 ABS0450 ASNA3757 ASNA3758 ABS0477 ABS0464 ASNA3765 NSA855022 ABS0566 ABS0534 ASNA3767 NSA855024 ASNA3752 ABS0542 ASNA3768 NSA855027 ASNA3753 ABS0544 NSA855011 NSA855036 ASNA3756 ABS0545 NSA855020 ASNA3764 ABS0650 NSA855025 ASNA3766 ABS0658 NSA855026 ASNA3772 ABS0669 NSA855030 NSA855006 and 008 ABS0675 NSA855032
ABS0711 NSA855033
NSA855037
NSA855033
NSA855037
You can swage PERMASWAGE fittings on the aircraft.
NOTE : The separable fittings have MS33514 or MS33515 threaded end or a
____
sleeve with a nut.
(1)
Remove the potable-water de-icing heater elementsas necessary (Ref. TASK 30-73-53-000-001).
(2)
Put a container below the potable water line to collect the unwanted water.
(3)
Cut the Tube
(a)
Remove the damaged parts of the tube and the defective ends with the applicable PERMASWAGE chipless cutting tool: To repair the tubing with the PERMASWAGE system, you must:
-cut the tube,
-deburr the tube,
-make the marks for tube inspection, (Ref. Fig. 212/TASK 20-23-38-991-007)
-put the swaging tool into position, (Ref. Fig. 220/TASK 20-23-38-991-012)
-swage the tube,
-do a check of the tube joint. You must use the applicable PERMASWAGE repair kit DLT series or D12000 series tools (vendor code F6087) (D12000 series is the previous generation). (Ref. Fig. 221/TASK 20-23-38-991-003, 222/TASK 20-23-38-991-002)
(b)
Remove the damaged parts of the tube and the defective ends with the applicable PERMASWAGE chipless cutting-tool: -D12531-001, tubes 1/2", 3/4" and 3/8".
(c)
Put the tubing cutter into the correct position on the tube. (Ref. Fig. 203/TASK 20-23-38-991-004)
(d)
Tighten the drive screw until the cutter wheel lightly touches the the tube. Then give the drive screw a 1/8 to 1/4 turn.
(e)
Turn the ratchet handle through the arc of the clearance until it turns loosely.
(f)
Do step (d) and (e) again to cut through the tube.
(g)
Cut the tube slowly and smoothly to make sure that the end of the tube does not change its shape.
(h)
Lubricate regularly the ratchet, the rollers and cutter wheels with OILS (Material No. 03-001) for easy operation.
Swage Tool Installation (Series DLT)
Figure 220/TASK 20-23-38-991-012
1EFF : ALL 1 20-23-38 Page 239
1 1 May 01/98
1 1
1CES 1
Subtask 20-23-38-350-051
B. Deburr the Tube (Ref. Fig. 206/TASK 20-23-38-991-051, 207/TASK 20-23-38-991-005, 208/TASK 20-23-38-991-018)
(1)
The internal diameter
(a)
Use the deburring tool and the stem subassembly that are correct for:
