ILF 607, 613, 614
SUBTASK 24-31-21-710-004
(2) Do a check of the battery discharge warning as follows:
(a) Set the GRD PWR switch on the P5-4 panel to the OFF position.
(b) Make sure that this circuit breaker is open and has safety tag:
F/O Electrical System Panel, P6-3
Row Col Number Name
C 15 C01355 LANDING GEAR AIR/GND SYS 2
(c) Make sure the airplane is in the ground mode.(Return the Airplane to the Ground Mode,
TASK 32-09-00-860-802)
(d) Make sure that this circuit breaker is closed:
F/O Electrical System Panel, P6-4
Row Col Number Name
B 12 C01940 BAT SW ON ALARM
(e) Wait for 2 minutes +/- 20 seconds.
(f) Make sure that the Ground Crew Horn in the nose wheel well does not sound.
(g) Make sure that this circuit breaker is closed:
F/O Electrical System Panel, P6-3
Row Col Number Name
C 15 C01355 LANDING GEAR AIR/GND SYS 2
(h) Wait for 2 minutes +/- 20 seconds.
(i) Make sure that the Ground Crew Horn in the nose wheel well sounds.
(j) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-4
Row Col Number Name
B 12 C01940 BAT SW ON ALARM
(k) Make sure that the Ground Crew Horn in the nose wheel well stops sounding.
(l) Remove the safety tag and close this circuit breaker:
F/O Electrical System Panel, P6-4
Row Col Number Name
B 12 C01940 BAT SW ON ALARM
(m) Wait for 2 minutes +/- 20 seconds.
(n) Make sure that the Ground Crew Horn in the nose wheel well sounds.
(o) Do this task: Prepare to Put the Airplane in the Air Mode, TASK 32-09-00-840-801.
(p) Make sure that the Ground Crew Horn in the nose wheel well stops sounding.
(q) Do this task: Return the Airplane to the Ground Mode, TASK 32-09-00-860-802.
(r) Wait for 2 minutes +/- 20 seconds.
(s) Make sure that the Ground Crew Horn in the nose wheel well sounds.
(t) Set the GRD PWR switch on the P5-4 panel to the ON position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-31-21
Page 503
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF 101, 151, 156-199, 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 401,
402, 405, 406, 409, 410, 412, 416, 424, 425, 427-429, 451, 452, 491-504, 507-510,
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620, 625-627, 671, 672, 686, 691-699, 703, 803-813, 821, 822, 831-838, 841, 842,
851, 852, 854-858, 861-863, 871-874, 947, 948, 968-973, 980-999
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