(a) mating surface of the airplane structure.
(b) mating surface of the operability indicator [1].
(c) bonding jumper [2].
ILF 402, 451, 452, 503, 504, 509, 510, 514, 523-528, 541, 574-577, 832, 856; 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, 491-493, 501, 502, 507, 508, 512, 513, 515, 516, 518-520, 530-533, 535-537, 542, 552-557,
559, 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
(d) mating surfaces of washer [4]
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
SUBTASK 47-31-03-420-001
(4) Do these steps to install the operability indicator [1]:
(a) Put the operability indicator [1] in its position.
(b) Install the two screws [9] and washers [10] that attach the operability indicator [1] to the
APU fire panel.
(c) Install the bolt [5], washer [6], flat washer [11], and nut [7] that attach the operability
indicator [1] to the bulkhead.
ILF 494-500, 560-564, 567-569, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620,
625-627, 671, 672, 691-699, 833-835, 838, 857, 858, 947, 948, 968-973, 980-999
(d) Install the washer [4] and the nut [3] to connect the bonding jumper [2] to the operability
indicator [1].
ILF 402, 451, 452, 503, 504, 509, 510, 514, 523-528, 541, 574-577, 832, 856; 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, 491-493, 501, 502, 507, 508, 512, 513, 515, 516, 518-520, 530-533, 535-537, 542, 552-557,
559, 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
(e) Install the bolt [12], three washers [4], and nut [3] to connect the bonding jumper [2] to the
operability indicator [1].
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
SUBTASK 47-31-03-700-001
(5) Use the intrinsically safe approved bonding meter, COM-1550, to measure the electrical
resistance between the operability indicator [1] and the airplane structure (SWPM 20-20-10).
ILF 494-500, 560-564, 567-569, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620,
625-627, 671, 672, 691-699, 833-835, 838, 857, 858, 947, 948, 968-973, 980-999
(a) Make sure that the electrical resistance between the operability indicator [1] and the
airplane structure is 0.001 ohm (1 milliohm) or less (SWPM 20-20-10).
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-31-03
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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