(a) Hold the check valve [1].
G. Remove the Check Valve
SUBTASK 47-21-04-030-004
(1) Disconnect the bonding jumper [2] from the ejector tube [3].
(a) Remove the screw [20], two washers [21] and nut [23] to remove the clamp [22] from the
ejector tube [3].
SUBTASK 47-21-04-030-002
(2) Loosen the nut [7] to disconnect the NEADS tube [6] from the check valve [1].
NOTE: Use a second wrench on the check valve [1] to prevent the NEADS tube [6] from
turning.
SUBTASK 47-21-04-030-003
(3) Loosen the nut [8] to disconnect the ejector tube [3] from the check valve [1].
NOTE: Use a second wrench on the check valve [1] to prevent the ejector tube [3] from
turning.
(a) Use a second wrench to hold the check valve [1].
SUBTASK 47-21-04-020-004
(4) Remove the check valve [1].
(a) Turn the NEADS tube [6] slowly to remove the check valve [1].
NOTE: The NEADS tube [6] is not flexible.
SUBTASK 47-21-04-420-004
(5) Install the protective caps on the ejector tube [3], the two ends of the NEADS tube [6], and the
flareless fitting [4].
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-21-04
Page 403
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF 402, 451, 452, 494-500, 503, 504, 509, 510, 514, 523-528, 541, 560-564, 567-569, 574-577, 581, 583, 585,
588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 691-699, 832-835, 838, 856-858, 947,
948, 968-973, 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, 501, 502, 507, 508, 512, 513, 516, 518, 531-533, 535-537, 542,
552-556, 571-573, 686, 703, 707-710, 803-813, 821, 822, 831, 836, 837, 841, 842, 851, 852, 854, 855, 861-863,
871-874 POST SB 737-47-1002 OR POST SB 737-47-1003 OR POST SB 737-47-1015; ILF 491-493, 515,
519, 520, 530, 557, 559 POST SB 737-47-1002 OR POST SB 737-47-1015
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