(b)
Inspection mark Make sure that the edge of the union touches or is on the inspection mark:
1_ Get the correct size inspection gage.
(Ref. Fig. 268/TASK 20-23-11-991-067)
With the applicable inspection gage, do a check for correct
position of the ring.
Make sure that you can install the inspection gage on the ring
(flush).
-this shows that the correct length of tube is engaged in the union.
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NOTE : The installation tolerance is divided between the two ends
____ of the union. If the maximum length of tube is engaged in one end of the union, the minimum length must be engaged in the other end. This is because unions can move freely on the tube (no positive tube stop). If the maximum length of tube is engaged, you cannot see the related inspection mark until after the swage.
5. Close-up
________
Subtask 20-23-11-860-056
A. Put the aircraft back to its initial configuration.
(1)
Pressurize the hydraulic reservoirs (Ref. TASK 29-14-00-614-002).
(2)
If necessary, fill the hydraulic reservoirs:
-with a hand pump (Ref. TASK 12-12-29-611-001) - or with a hydraulic cart (Ref. TASK 12-12-29-611-002)
(3)
Pressurize the hydraulic systems:
-
for the Green system (Ref. TASK 29-10-00-863-001)
-
for the Yellow system (Ref. TASK 29-10-00-863-002)
-
for the Blue system (Ref. TASK 29-10-00-863-003).
(4)
Make sure that there is no leakage in the repaired area.
(5)
Bleed the related hydraulic system:
(a)
For the Green system:
-
upstream of the engine pump (Ref. TASK 29-00-00-870-001)
-
upstream of the PTU (Ref. TASK 29-00-00-870-002)
-downstream of the engine pump (Ref. TASK 29-00-00-870-003).
(b)
For the Yellow system:
-
upstream of the engine pump (Ref. TASK 29-00-00-870-004)
-
upstream of the PTU (Ref. TASK 29-00-00-870-005)
-
upstream of the Yellow E-pump (Ref. TASK 29-00-00-870-006)
-downstream of the engine pump (Ref. TASK 29-00-00-870-007).
(c)
For the Blue sytem:
-upstream of the Blue E-pump (Ref. TASK 29-00-00-870-008)
-downstream of the Blue E-pump (Ref. TASK 29-00-00-870-009).
(d)
For the normal braking system (Ref. TASK 32-42-00-870-001).
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(e) For the alternate braking system.
-low pressure (Ref. TASK 32-43-00-612-001)
-high pressure (Ref. TASK 32-43-00-870-002).
(6) If applicable, restore the protection on the repaired tube.
(a)
For aluminum tubes:
(b)
For CRES tube (if painted): 1 Rub the bare metal with scotch-brite pad.
1_ Apply PRETREATMENT FOR PAINTING (Material No. 13-002) on the
bare metal of the tube with a brush.
2_ Finish the protection with STRUCTURE PAINTS (Material No. 16-
001C).
_ 2 Apply STRUCTURE PAINTS (Material No. 16-020) on the bare metal
_ of the tube.
3 Finish the protection with STRUCTURE PAINTS (Material No. 16-
_ 001C).
(7) Make sure that the work area is clean and clear of tool(s) and other items.
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TASK 20-23-11-300-008
Temporary Repair of Hydraulic Tubes by Welding
1. Reason for the Job
__________________
This procedure describes a method for the temporary repair of hydraulic tubes. This method uses a manual T.I.G. welding process. NOTE : This temporary repair is not applicable for hydraulic pipes installed
____
in the pylon area.
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