2) Install the coupling [5].
(d) Tighten the nut on the HFV muscle air duct [7] to 280 ±28 in-lb (31.6 ±3.2 N·m).
NOTE: Use two wrenches to tighten the nuts. This will release torque pressure on the
HFV muscle air duct [7] and the NEA duct [11].
(e) Tighten the nut on the NEA duct [11] to 280 ±28 in-lb (31.6 ±3.2 N·m).
NOTE: Use two wrenches to tighten the nuts. This will release torque pressure on the
HFV muscle air duct [7] and the NEA duct [11].
(f) Tighten the nut on the oxygen sensor tube [19] to 170 ±17 in-lb (19.2 ±1.9 N·m).
NOTE: Use two wrenches to tighten the nuts. This will release torque pressure on the
HFV muscle air duct [7] and the oxygen sensor tube [19].
SUBTASK 47-11-02-420-001
(3) Do these steps to finish the installation:
(a) Tighten the four bolts [3] to 109 ±6 in-lb (12.3 ±0.7 N·m).
(b) Connect the electrical connector [13] to the differential pressure sensor.
(c) Connect the electrical connector [13] to the high flow valve [1].
(d) Attach the bonding jumper [14] to the jumper tab [18] with the screw [15], washers [16],
and nut [17].
SUBTASK 47-11-02-765-001
(4) Use an intrinsically safe approved bonding meter, COM-1550, to measure the resistance
between the jumper tab [18] and bracket (SWPM 20-20-00)
(a) Make sure that the resistance is 0.010 ohm (10 milliohms) or less.
SUBTASK 47-11-02-390-001
(5) Apply BMS 5-45 sealant, A50337, to fully cover the screw [15], washers [16], nut [17], and
jumper tab [18].
I. Operational Test for the High Flow Valve
SUBTASK 47-11-02-865-002
(1) Do these steps to prepare for the operational test:
(a) Remove the safety tags and close these circuit breakers:
CAPT Electrical System Panel, P18-3
Row Col Number Name
ILF 402, 452, 509, 510, 523, 525-528, 576, 577, 971; 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
D 17 C01657 NITROGEN GEN CONT
ILF 568, 569, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627,
691-699, 833-835, 838, 980-999; ILF 567, 973 POST SB 737-47-1003
D 17 C01657 NITROGEN GENERATION CONTROL
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-11-02
Page 409
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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