(b) Disconnect the electrical connector [13] from the high flow differential pressure sensor.
SUBTASK 47-11-02-030-006
(4) Remove the screw [15], washers [16], and nut [17] to disconnect the bonding jumper [14] from
the high flow valve [1].
(a) Keep the screw [15], washers [16], and nut [17] for the installation.
SUBTASK 47-11-02-030-004
(5) Do these steps to disconnect the high flow valve [1] from the NGS:
(a) Disconnect the coupling [5] from the NEA outlet port on the ASM [8].
1) Keep the coupling [5] for the installation.
(b) Remove the sleeve [10].
1) Keep the sleeve [10] for the installation.
(c) Discard the two o-rings [9].
(d) Install identification tags on the ducts and fittings.
NOTE: This will clearly identify the correct connection locations.
(e) Loosen the nut on the NEA duct [11] at the outlet port on the high flow valve [1].
NOTE: Be careful that you do not bend the NEA duct [11]. It must accurately align with
the high flow valve [1] on the installation.
(f) Loosen the nut on the HFV muscle air duct [7].
NOTE: Be careful that you do not bend the HFV muscle air duct [7]. It must accurately
align with the high flow valve [1] on installation.
(g) Loosen the nut on the oxygen sensor tube [19].
NOTE: Be careful that you do not bend the oxygen sensor tube [19]. It must accurately
align with the high flow valve [1] on installation.
SUBTASK 47-11-02-020-001
(6) Do these steps to remove the high flow valve [1]:
(a) Hold the high flow valve [1] in its position.
(b) Remove the four bolts [3] and washers [4].
1) Keep the bolts [3] and washers [4] for installation.
SUBTASK 47-11-02-490-001
(7) Install protective covers on these open ports:
(a) ASM [8]
(b) HFV muscle air duct [7]
(c) NEA duct [11]
(d) oxygen sensor tube [19]
SUBTASK 47-11-02-490-002
(8) Install protective covers on the high flow valve [1].
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-11-02
Page 403
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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
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