(a) Use water to lubricate the four O-rings [4].
(b) Install the O-rings [4] to the o-ring cavities on the NGS filter assembly [1] and the ends of
the outlet duct [3] and the inlet duct [9].
SUBTASK 47-32-04-420-001
(7) Do these steps to install the NGS filter assembly [1]:
(a) Apply a thin layer of compound, C00852, to the three bolts [6].
(b) Apply a thin layer of corrosion inhibiting material, G50136, to each washer [10].
1) Remove all excess corrosion inhibiting material, G50136.
(c) Hold the NGS filter assembly [1] in its position at the filter bracket [2].
(d) Install, but do not tighten, the three bolts [6], washers [7], and washers [10].
1) Make sure that each washer [10] is installed between the NGS filter assembly [1]
and filter bracket [2].
NOTE: The NGS filter assembly [1] and the filter bracket [2] are made from
dissimilar materials. The washer [10] and washer [7] are installed between
them to prevent electrical arcing and corrosion.
2) Make sure that the NGS filter assembly [1] is aligned with the outlet duct [3] and the
inlet duct [9].
(e) Move the coupling [5] and the coupling [8] into their positions.
1) Latch the coupling [5] between the outlet duct [3] and NGS filter assembly [1].
2) Latch the coupling [8] between the inlet duct [9] and NGS filter assembly [1].
(f) Tighten the three bolts [6] to 80 ±2 in-lb (9 ±0 N·m).
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
SUBTASK 47-32-04-760-001
(8) Use an intrinsically safe approved bonding meter, COM-1550, to measure the electrical
resistance between the outlet duct [3] on the NGS filter assembly [1] and the filter bracket
(SWPM 20-20-00).
(a) Make sure that the resistance is 0.010 ohm (10 milliohms) or less (SWPM 20-20-00).
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
SUBTASK 47-32-04-760-002
(9) Use an intrinsically safe approved bonding meter, COM-1550, to measure the electrical
resistance between the NGS filter assembly [1] and filter bracket [2] (SWPM 20-20-00).
(a) Make sure that the resistance is 0.008 ohm (8 milliohms) or less (SWPM 20-20-00).
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
SUBTASK 47-32-04-410-002
(10) Install the flexible ram air exhaust hose.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-32-04
Page 417
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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