(b) Make sure the 2 DRIVE light on the P5 panel stays on.
(c) Slowly pull the IDG Disconnect Reset Ring on the IDG to the outward travel limit. Make a
note of the amount of hand force necessary.
(d) Make sure that the force necessary is light.
(e) Make sure that no click is felt when pulling the IDG Disconnect Reset Ring.
(f) Allow the IDG Disconnect Reset Ring to slowly return to the maximum inward position.
(g) Open these circuit breakers and install safety tags:
F/O Electrical System Panel, P6-4
Row Col Number Name
F 8 C01286 GENERATOR DISC 1
F 9 C01287 GENERATOR DISC 2
(h) Obey all safety precautions around running the engines (TASK 71-00-00-800-805-F00).
(i) Start the applicable engine (TASK 71-00-00-800-807-F00).
1) Let the applicable engine operate at idle power.
(j) Make sure that the AC voltage is 115 ± 5 and the frequency is 400 ± 5.
(k) Remove the safety tags and close these circuit breakers:
F/O Electrical System Panel, P6-4
Row Col Number Name
F 8 C01286 GENERATOR DISC 1
F 9 C01287 GENERATOR DISC 2
(l) Make sure that the AC voltage and the frequency do not change.
(m) Shut down the applicable engine (TASK 71-00-00-700-819-F00).
SUBTASK 24-11-00-700-002
(3) Do a test of the GCU as follows:
(a) Make sure that the STANDBY POWER switch on the P5-5 panel is set to the AUTO
position.
(b) Set the BAT switch on the P5-13 panel to the ON position.
(c) Push the GCU TEST switch on the GCU for at least one second.
(d) Make sure that all seven of the indicator lights on the GCU come on for approximately
three seconds.
(e) Make sure that all seven of the indicator lights on the GCU go off for approximately three
seconds.
(f) Make sure that the green GCU PASS light on the GCU comes on for approximately
seven seconds.
SUBTASK 24-11-00-860-005
(4) Do this task: Close the Fan Cowl Panels, TASK 71-11-02-410-801-F00.
H. Put the airplane in its usual condition.
SUBTASK 24-11-00-860-006
(1) Do this task: Remove Electrical Power, TASK 24-22-00-860-812.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-00
Page 517
D633A101-ILF Oct 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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