(5)
Preset BACS13AP Flareless Sleeves.
(6)
Install the 921721 Cryolive Flareless Sleeve Assembly.
(7)
Install the BACC42W H-Coupling.
(8)
Install the 3P02111 or 3PHS111 cryofit couplings.
(9)
Install Permaswage Fittings.
(10)
Install the Rynglok 8010T permanent tube to tube union.
(11)
Aluminum Fuel Tubes, temporary weld repair method.
B. This procedure gives the approved repairs for hydraulic, pneumatic, water, fire extinguisher, electrical rigid conduit, and other tube assemblies. Repair procedures include the replacement of damaged tube ends or the replacement of small damaged tube parts. You can use flareless tubes and sleeves, H-Coupling assemblies, Cryofit couplings, Permaswage fittings , Cryolive assemblies, or Rynglok unions.
C. For the approved repair of fuel system aluminum tubes, refer to CMM 28-00-12.
D. You can repair 6061-T4 aluminum tubes using 6061-T6 aluminum tube and flareless fittings. It is not acceptable to repair 6061-T6 aluminum tube with 6061-T4 aluminum tube or use 6061-T4 aluminum tube in place of 6061-T6 aluminum tube.
E. You can use approved 304-1/8 Hard or 21-6-9 corrosion-resistant steel tube assemblies to replace titanium tube assemblies. You can also use approved 304-1/8 Hard corrosion-resistant steel tube assemblies to replace 21-6-9 corrosion-resistant steel tube assemblies.
F. When you do repairs, the type of flareless tube sleeves will tell you the installation method to use.
(1)
Use approved power swaging equipment, or roller swaging, to do all swaged-on sleeves and fittings.
(2)
You can preset BACS13AP flareless sleeves by machine. Preset by hand only when a hydraulic or pneumatic-operated presetting tool is not available. If you must preset by hand, we recommend that you preset some samples. Cut the samples into sections longitudinally and make an inspection of the ring cut depth before you preset the part to be repaired.
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20-10-09
ALL ú ú 01 Page 801 ú May 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL
(3) You can install the CRYOLIVE sleeve assembly, consisting of CRYOLIVE sleeve, coupling nut and protective cover/inspection tool, by removing the assembly from liquid nitrogen and sliding it on to the tube end. Note that the Size 10, Size 12 and Size 16 coupling nuts used with the CRYOLIVE sleeve are slightly longer than standard MS type coupling nuts and are not interchangeable with MS type coupling nuts.
G. The H-coupling assembly is a repair coupling which has a union coupling, a slide, and a nut. You can install the H-coupling assembly in straight sections of the tube. Use two end wrenches of applicable size. This assembly is approved for fuel and hydraulic high pressure lines of 21-6-9, titanium 3AL-2.5V, and 304-1/8 hard CRES tubing. The H-coupling assembly is also approved for the repair of 304 CRES annealed and 6061-T6 aluminum tubing lines of 3000 psi or less.
H. You can use a Cryofit coupling for the inline repair of 3AL-2.5V titanium tubing. To install the Cryofit coupling in a straight tube section, shrink fit the coupling in its position.
I. You can use the Permaswage coupling for inline repair of 6061-T6 aluminum, 21-6-9 CRES or 304-1/8 hard CRES, and 3AL-2.5V titanium tubing.
J. You can use the Rynglok union for inline repair of 6061-T6 aluminum, 21-6-9 CRES or 304-1/8 hard CRES, and 3AL-2.5V titanium tubing. Rynglok unions are made of lightweight 6AL-4V titanium alloy and are not to be
ú used in oxygen systems, in fuel cells, or in repair of tubes installed in ú engines.
K. When you repair a section of a tube, correctly align the tube and the fittings. Make sure the fittings touch the bottom at the two ends of the repaired section. Do not use fitting nuts to align the fittings. Fitting nuts used to align fittings during the tube installation will increase the risk of leakage, blowoff, or other failure.
L. Do a leak check on all hydraulic tubes disconnected during the repair procedure.
(1)
Pressurize the hydraulic tubes for a mimimum of 5 minutes.
(2)
Rub all the fittings with a clean white cloth.
(3)
Look for hydraulic fluid on the cloth to find leakage.
