ILF 401, 406, 409, 410, 412, 416 PRE SB 737-24-1128 (Continued)
(b) Loosen the screws one full turn, then tighten the screws to 25 ±1 in-lb (3 ±0 N·m).
ILF ALL
SUBTASK 24-21-71-410-001
(5) Install the applicable forward bulkhead liner.
G. The Installation Test of the Current Transformer
SUBTASK 24-21-71-700-001
(1) If you replaced the GEN 1 DPCT, T374 or GEN 2 DPCT, T375 do this test:
(a) Start the applicable engine, do this task: Start the Engine Procedure (Selection),
TASK 71-00-00-800-807-F00.
(b) Make sure the applicable GEN OFF BUS light on the P5-4 panel is on.
(c) Set the applicable GEN control switch on the P5-4 panel to the ON position.
(d) Make sure the applicable GEN OFF BUS light on the P5-4 panel goes off.
(e) Stop the engine, do this task: Stop the Engine Procedure (Usual Engine Stop),
TASK 71-00-00-700-819-F00.
SUBTASK 24-21-71-700-002
(2) If you replaced the EXT PWR CT, T378 do this test:
(a) Make sure the BAT switch on the P5-13 panel is in the ON position.
(b) Set the BUS TRANS switch on the P5-4 panel to the AUTO position.
(c) Make sure both TRANSFER BUS OFF lights on the P5-4 panel are on.
(d) Connect external power to the P19 panel.
(e) Make sure the GRD POWER AVAILABLE light on the P5-4 panel is on.
(f) Set the GRD PWR switch on the P5-4 panel to the ON position.
(g) Make sure both TRANSFER BUS OFF lights on the P5-4 panel go OFF.
(h) Do this task: Remove External Power, TASK 24-22-00-860-814.
SUBTASK 24-21-71-700-003
(3) If you replaced the APU DPCT, T376 do this test:
(a) Do this task: APU Starting and Operation, TASK 49-11-00-860-801.
(b) Make sure the APU GEN OFF BUS light on the P5-4 panel comes on (approximately 50
seconds) after APU start.
(c) Set either of the APU GEN switches on the P5-4 panel to the ON position.
(d) Make sure the APU GEN OFF BUS light on the P5-4 panel goes off.
(e) Do this task: Remove APU Generator Power, TASK 24-22-00-860-816.
H. Put the airplane in its usual condition.
SUBTASK 24-21-71-860-003
(1) Do this task: Remove Electrical Power, TASK 24-22-00-860-812.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-71
Page 416
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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