E. Expendables/Parts
AMM Item Description AIPC Reference AIPC Effectivity
5 Float valve assembly 47-21-02-01-030 ILF 494, 495, 857, 858,
947
6 O-ring 47-21-02-01-025 ILF 494, 495, 857, 858,
947
F. Location Zones
Zone Area
631 Right Wing - Center Fuel Tank, Rib 1 to Rib 5
G. Access Panels
Number Name/Location
631AB Center Tank Access Door - Wing Station 168
H. Prepare for the Installation
SUBTASK 47-21-02-010-002
(1) Go into the center tank in the right wing.
SUBTASK 47-21-02-010-003
(2) Remove the protective cap from the vent tube.
SUBTASK 47-21-02-100-001
(3) Make sure that the mating surfaces between the float valve assembly [5] and the adapter [2]
are free of sealants, grease, and unwanted material.
(a) Make sure that the new o-ring [6] cavity in the float valve assembly [5] is clean and free of
sealants and unwanted material.
SUBTASK 47-21-02-110-002
(4) To clean the components, do this task: General Cleaning of Metal (Series 80),
TASK 20-30-80-910-801.
SUBTASK 47-21-02-110-001
(5) Prepare the contact surfaces of these components for a faying surface bond (SWPM
20-20-00):
(a) float valve assembly [5]
(b) adapter [2]
I. Install the Float Valve
SUBTASK 47-21-02-640-001
(1) Do these steps to install the new o-ring [6]:
(a) Apply a thin coat of grease, D00128, to the new o-ring [6].
(b) Put the new o-ring [6] in the cavity on the float valve assembly [5].
(c) Remove excess grease, D00128, with a cotton wiper, G00034.
SUBTASK 47-21-02-420-001
(2) Do these steps to install the float valve:
(a) Put the float valve assembly [5] in its position on the adapter [2].
(b) Install the four screws [4] and the washers [3].
SUBTASK 47-21-02-212-001
(3) Do a check of the float valve:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-21-02
Page 407
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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