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3. Job Set-up
__________
Subtask 20-23-11-917-065
A. General
(1) Temporary repair with MS21922 sleeve. (Ref. Fig. 242/TASK 20-23-11-991-032)
(a) This temporary repair is applicable only for hydraulic tubes in 21-6-9 corrosion-resistant steel or 6061-6 aluminum alloy.
R R (b) Do not use MS21922 sleeves for permanent repairs. These sleeves are for temporary repairs (No more than 2500 flight hours). Complete this procedure with the applicable permanent repair procedure: - Repair of the hydraulic tubes with PERMASWAGE fittings, - Repair of the hydraulic tubes with HARRISON sleeves and unions, - Repair of the hydraulic tubes with SIERRACIN/HARRISON H-fittings.
(c) You can use MS sleeves to do repairs on tubes that have MS33514 or MS33515 fittings. No special tools are necessary. The subsequent separation of joints with MS sleeves is possible. You must remove the tubes when you swage with MS sleeves.
(2) Temporary repair of a tube with a flexible hose.
(a) The life limit of a temporary repair with a flexible hose is 20 takeoffs or the next "A" check. You must replace the temporary repair before the limit that occurs first.
R (3) Temporary repair of a titanium tube with H-fitting.
R R (a) A temporary repair with an H-fitting has a life limit of 20 takeoffs. You must do a visual inspection of the temporary repair after each flight.
R Repair Procedure with an MS Sleeve Figure 242/TASK 20-23-11-991-032
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4. Procedure_________
Subtask 20-23-11-917-066
R A. Repair with an MS 21922 Sleeve
R R (1) Find the length of tube you must cut as a function of the location of the damaged area. (Ref. Fig. 243/TASK 20-23-11-991-036, 244/TASK 20-23-11-991-037, 245/TASK 20-23-11-991-038, 246/TASK 20-23-11-991-039)
R R R R NOTE : If you must use a different tube to repair the damaged area,____ use a rigid tube of the same type as the tube you must repair, if possible. If you use a flexible hose for the repair, refer to the temporary repair procedure of tubes with flexible hoses (this procedure is in this task).
(2) Cut the tube. Cut and deburr the inner and outer diameters of the ends of the tubes.
(3) Clean the end of the tube with CLEANING AGENTS (Material No. 11-003).
(4) Install the fitting.
(a) Put the nut and the sleeve on the tube.
NOTE : Make sure that the cutting edge of the sleeve points to____ the end of the tube.
R (b) Lubricate with HYDRAULIC FLUIDS (Material No. 02-003): - the threads and the mating face of the nut, - the threads of the union.
(c) Put the end of the tube into the fitting.
(5) Do the swaging. (Ref. Fig. 247/TASK 20-23-11-991-033)
(a) Hold the tube against the shoulder of the union and tighten the nut fully with your hand.
(b) From this position, tighten the nut to swage the sleeve (obey the number of turns for the nut).
Repair of a Straight Tube Section Figure 243/TASK 20-23-11-991-036
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Repair of a Union Figure 244/TASK 20-23-11-991-037
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Repair of a Tube End Figure 245/TASK 20-23-11-991-038
1EFF : 1 1R 1CES ALL 1 11 1 20-23-11 Page A208 Feb 01/05
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