SUBTASK 24-21-71-010-001
(2) Remove the applicable forward bulkhead liner in the forward cargo area to get access to the
back of the power distribution panel.
SUBTASK 24-21-71-010-002
(3) Do the following steps to remove the power feeders from the power distribution panel:
(a) Install identification tags on the power feeders before removing them.
(b) Remove the nuts [2] and washers [1] from each terminal stud.
(c) Remove power feeders from terminal studs.
E. Procedure
ILF 401, 406, 409, 410, 412, 416 PRE SB 737-24-1128
SUBTASK 24-21-71-020-001
(1) AIRPLANES WITH OLD RIGID BUS ASSEMBLIES (PRE- SB 24-1128) (PRE - PRR 38317);
do the steps that follow to remove the current transformer [10]:
(a) Remove the three screws [4] and washers [5] that hold the cover [3] on the rigid bus
assembly.
(b) Remove the aft two bolts and washers that hold the cooling duct assembly to the bottom
of the cover [3].
NOTE: You can loosen the fwd two bolts to make removal of the cover [3] easier.
(c) Remove the cover [3].
NOTE: Be careful when removing the cover. There are bushings [6] installed between
the terminal studs and the cover that could fall out when the cover is removed.
(d) Install identification tags on the three wires connected to the terminal studs [7].
(e) Remove the three screws [12] and washers [11] that hold the terminal studs [7] and the
wires to the rigid bus assembly.
(f) Remove the terminal studs [7] from the current transformer.
NOTE: Identify the slot each terminal stud was removed from so that it can be installed
in the same slot.
(g) Loosen the two screws that hold the electrical connector to the current transformer.
(h) Remove the electrical connector.
(i) Remove the screw [8] and washer [9] that hold the current transformer to the rigid bus
assembly.
(j) Remove the current transformer [10].
ILF 101, 151, 156-199, 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 402, 405, 424, 425,
427-429, 451, 452, 491-504, 507-510, 512-516, 518-520, 523-528, 530-533, 535-537, 541, 542, 552-557,
559-564, 567-569, 571-577, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620,
625-627, 671, 672, 686, 691-699, 703, 707-710, 803-813, 821, 822, 831-838, 841, 842, 851, 852,
854-858, 861-863, 871-874, 947, 948, 968-973, 980-999; ILF 401, 406, 409, 410, 412, 416 POST SB
737-24-1128
SUBTASK 24-21-71-020-002
(2) AIRPLANES WITH NEW RIGID BUS ASSEMBLIES (POST- SB 24-1128) (POST - PRR
38317); do the steps that follow to remove the current transformer [10]:
(a) Remove the three screws [4] and washers [5] that hold the cover [3] on the rigid bus
assembly.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-71
Page 402
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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