(a) Make sure that the float valve is in the fully open position.
(b) Make sure that the float valve moves freely.
(c) Make sure that the float valve is not limited by the adjacent structure.
SUBTASK 47-21-02-700-001
(4) Use a intrinsically safe approved bonding meter, COM-1550, to measure the bonding
resistance between base of the float valve assembly [5] and the vent channel (SWPM
20-20-00).
(a) Make sure the total resistance is 0.010 ohm (10 milliohms) or less.
SUBTASK 47-21-02-390-001
(5) Apply a fillet seal of sealant, A00767, or sealant, A50303, around the float valve assembly [5]
and the adapter [2].
SUBTASK 47-21-02-390-002
(6) Apply cap seal of sealant, A50337, on the screw [4].
SUBTASK 47-21-02-390-003
(7) Manually apply Bonderite M-CR 600 Aero coating, C00862, to exposed surfaces on the base
of the float valve assembly [5].
J. Put the Airplane Back to the Usual Condition
SUBTASK 47-21-02-410-001
(1) Do this task to go out of and close the fuel tank: Center Tank Access Door - Installation,
TASK 28-11-31-400-801.
Close this access panel:
Number Name/Location
631AB Center Tank Access Door - Wing Station 168
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-21-02
Page 408
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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