(a) Secondary back flow prevention check valve
(b) NEADS tube segments
(c) NEADS couplings
(d) High flow valve
SUBTASK 47-21-00-030-001
(4) Remove the leak detector, G50135, compound with a cotton wiper, G00034.
SUBTASK 47-21-00-360-002
(5) Open the bleed valve slowly and let the pressure in the lines bleed to zero, then repair the
problems that are found.
SUBTASK 47-21-00-780-013
(6) After you repaired the problems you found, use the 0-30 psig dry filtered regulated air source,
STD-1280, to apply 20 psig (138 kPa) to the NEADS line.
(a) Use the leak detector, G50135, compound to do a check for leaks at the components you
repaired.
SUBTASK 47-21-00-780-012
(7) After you are done with the leak check, slowly remove the air pressure from the pressure test
equipment, SPL-7455.
K. Test Equipment Removal - Drain Port
SUBTASK 47-21-00-080-002
(1) Disconnect the air source from the pressure test equipment, SPL-7455.
SUBTASK 47-21-00-020-001
(2) Disconnect the hose assembly from the drain port.
SUBTASK 47-21-00-420-001
(3) Install the drain cap on the drain port (TASK 47-21-11-400-801).
L. Test Equipment Removal - Center Tank
SUBTASK 47-21-00-080-005
(1) Disconnect the cap assembly (pressure test equipment, SPL-7455) from the NEADS tube.
SUBTASK 47-21-00-410-002
(2) Install the primary backflow prevention check valve (TASK 47-21-04-400-801)
M. Put the Airplane Back to Its Usual Condition
SUBTASK 47-21-00-410-004
(1) Close these access panels:
Number Name/Location
192BL ECS Ram Air Inlet Mixing Duct Panel - Forward
192CL ECS Access Door
SUBTASK 47-21-00-410-005
(2) Close the center tank access door (TASK 28-11-31-400-801).
(a) Close this access panel:
Number Name/Location
531AB Center Tank Access Door - Wing Station 168
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-21-00
Page 607
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF 402, 452, 509, 510, 523, 525-528, 568, 569, 576, 577, 581, 583, 585, 588-590,
592-599, 601-603, 606, 607, 610-615, 620, 625-627, 691-699, 833-835, 838, 971, 980-999;
ILF 101, 151, 156-199, 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 401, 405,
406, 409, 410, 412, 416, 424, 425, 427-429, 451, 501-504, 507, 508, 512-514, 516, 518,
524, 531-533, 535-537, 541, 542, 552-556, 560-562, 567, 571-575, 671, 672, 686, 703,
707-710, 803-813, 821, 822, 831, 832, 836, 837, 841, 842, 851, 852, 854-858, 861-863,
871-874, 947, 948, 968-970, 972, 973 POST SB 737-47-1003
To Next Page
Loading...
