(a) Tighten the nut on the tube [2] to the airplane structure.
(b) Tighten the nut on the other end of the tube [2] to the tee [7].
SUBTASK 47-32-03-420-003
(2) Install the washers [8], nut [6] and bolt [3] to install the clamp [1] on the tube [2].
SUBTASK 47-32-03-420-004
(3) Install the washers [5], nut [6] and bolt [3] to attach the bonding jumpers [4] to the tube [2]
SUBTASK 47-32-03-700-001
(4) Use an intrinsically safe approved bonding meter, COM-1550, to measure the electrical
resistance between the tube [2] and the airplane structure (SWPM 20-20-00).
(a) Make sure that the electrical resistance is 0.010 ohm (10 milliohms) or less (SWPM
20-20-00).
K. Operational Test for the Heat Exchanger
SUBTASK 47-32-03-710-001
(1) Prepare the airplane 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
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
E 15 C01680 NGS ALT PWR
(b) Remove the DO-NOT-OPERATE tags from these switches on the P5 panel.
1) L PACK
2) R PACK
3) BLEED 1
4) BLEED APU
(c) Put the L PACK and R PACK selector switches to the AUTO position.
(d) Put the BLEED 1, BLEED APU, and BLEED 2 switches to the ON position.
SUBTASK 47-32-03-790-001
(2) Do this task: Leak Check of the Nitrogen Generation System, TASK 47-00-00-790-801.
(a) With the NGS pressurized, do a check for leaks around the heat exchanger [11].
(b) Repair the leaks that you find.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-32-03
Page 413
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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