(e)
Install the nut again and tighten the nut. (See BACC42W Standard).
(f)
If the union does not touch the tape, you must remove the coupling and a sufficient tube length. Install a new repair section.
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747-400 MAINTENANCE MANUAL
TASK 20-11-05-408-344
9. Install the 3P02111 or 3PHS111 Cryofit Couplings (Fig. 823)________________________________________________
A. General
WARNING: DO NOT USE CRYOFIT COUPLINGS ON ANY OXYGEN LINES OR ON FLUID
_______ LINES INSIDE THE FIRE ZONES OF ENGINES OR APU'S. DAMAGE TO EQUIPMENT OR INJURY TO PERSONS CAN OCCUR. THE CRYOFIT COUPLING IS NOT QUALIFIED FOR THESE APPLICATIONS.
WARNING:_______USE EXTREME CAUTION WHEN USING LIQUID NITROGEN. THE TEMPERATURE OF LIQUID NITROGEN IS 320 DEGREES BELOW ZERO. PROVIDE PROPER VENTILATION AS LIQUID NITROGEN VAPORS CAN DISPLACE OXYGEN IN CONFINED AREAS. USE SAFETY GLASSES, A FACE SHIELD, AND INSULATED GLOVES WHEN USING LIQUID NITROGEN. MISSUSE OF LIQUID NITROGEN CAN CAUSE INJURY TO PERSONS.
WARNING: SLOWLY AND CAREFULLY SUBMERGE WARM ITEMS IN LIQUID NITROGEN TO
_______ PREVENT RAPID BOILING OFF AND SPLASHING. MISSUSE OF LIQUID NITROGEN CAN CAUSE INJURY TO PERSONS.
(1)
The Cryofit coupling is a fitting which you can use to repair Ti-3AL-2.5V tubing as shown in Fig. 802. To install the fitting in a straight section, shrink fit it in its position.
B.
Equipment
(1)
Cryofit repair kit - FRK3P02111-001 (Aerofit
Products, Inc. 6460 Dale Street, Buena Park,
California 90621).
(2)
Tongs (any suitable), (available from Aerofit Products, Inc. 6460 Dale Street, Buena Park, California 90621) (P/N AT911067-01).
(3)
Insulated Gloves (available from Aerofit Products, Inc. 6460 Dale Street, Buena Park, California 90621 by P/N OE-Glove-Liner, S-M-L or from Damart Corporation, 1811 Woodbury Avenue, Portsmouth, New Hampshire 03805 by P/N 264E).
(4)
Work Box, Insulated (available from Aerofit Products, Inc., 6460 Buena Park, California 90621 by P/N WB910825-01).
NOTE:____AEROFIT PRODUCTS, INC. CRYOFIT COUPLINGS AND EQUIPMENT ARE AVAILABLE FROM T.W. METALS, INC.
(5)
(commercially available) Safety Glasses
(6)
(commercially available) Face Shield
C.
Consumable Materials
(1)
G00262 Liquid nitrogen
(2)
B01000 Solvent - General Cleaning of Metal
(Series 80)
(3)
A00558 Loctite 290
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(4) G00270 Masking Tape
D. Procedure
S 868-345
(1) Remove pressure from the systems where you will do repairs.
S 118-346
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(2)
Use solvent, Series 80 (AMM 20-30-80/201) to clean the tube in the area where you will install the Cryofit coupling.
S 438-347
(3)
Use tape to make a mark on the tube to make sure you put the Cryofit coupling over the center of the tube repair.
S 328-348
(4)
Cut the tube.
S 118-349
(5)
Chamfer and remove burrs from the ID and OD edges. Clean the edges with solvent, Series 80 (AMM 20-30-80/201).
S 948-350
WARNING:_______USE EXTREME CARE WHEN USING LIQUID NITROGEN. THE TEMPERATURE OF LIQUID NITROGEN IS 320 DEGREES BELOW ZERO. PROVIDE PROPER VENTILATION AS LIQUID NITROGEN VAPORS CAN DISPLACE OXYGEN IN CONFINED AREAS. USE SAFETY GLASSES, A FACE SHIELD, AND INSULATED GLOVES WHEN USING LIQUID NITROGEN. MISSUSE OF LIQUID NITROGEN CAN CAUSE INJURY TO PERSONS.
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