H. The Installation Test of the Breaker
SUBTASK 24-21-41-700-001
(1) If you replaced one of the Generator Control Breakers, 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 blue GEN OFF BUS light on the P5-4 panel is on.
(c) Set the GEN control switch on the P5-4 panel to the ON position.
(d) Make sure the blue 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 24-21-41-700-002
(2) If you replaced one of the Bus Tie Breakers, 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 amber TRANSFER BUS OFF lights on the P5-4 panel are on.
(d) Connect external power to the P19 panel.
(e) Make sure the blue GND 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 amber 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 24-21-41-700-003
(3) If you replaced the Auxiliary Power Breaker, do this test:
(a) Do this task: APU Starting and Operation, TASK 49-11-00-860-801.
(b) Make sure the blue 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 blue APU GEN OFF BUS light on the P54 panel goes off.
(e) Do this task: Remove APU Generator Power, TASK 24-22-00-860-816.
I. Put the Airplane in its Usual Condition.
SUBTASK 24-21-41-410-001
(1) Close this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 24-21-41-860-003
(2) Do this task: Remove Electrical Power, TASK 24-22-00-860-812.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-41
Page 411
D633A101-ILF Jun 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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