(o) Allow the IDG Disconnect Reset Ring to slowly return to the maximum inward position.
SUBTASK 24-11-00-710-005
(2) Do a check of the IDG disconnect inhibit function as follows:
NOTE: The IDG disconnect function is inhibited when the engine is below idle speed.
CAUTION
DO NOT ACTUATE THE DISCONNECT SWITCH FOR MORE THAN 3
SECONDS. ALLOW A MINIMUM OF 60 SECONDS BETWEEN
ACTUATION PERIODS. FAILURE TO FOLLOW THIS PROCEDURE CAN
CAUSE DAMAGE TO IDG.
(a) Set the 1 DISCONNECT switch on the P5 overhead panel to the DISCONNECT position.
NOTE: Put a person near the IDG listening for no click and feeling for no movement
while lightly holding the IDG Disconnect Reset Ring. There should be no click
and no movement at IDG when the 1 DISCONNECT switch is pushed.
(b) Make sure that the 1 DRIVE light on the P5 overhead 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 24-11-00-700-001
(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.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-00
Page 507
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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