ILF 562, 588, 592-596, 686, 833, 834, 854-856, 861-863, 871-874
SUBTASK 24-21-81-210-002
(3) If the TR UNIT and ELEC lights on the P5-13 panel are on do the steps that follow:
NOTE: If the GCU 2, G12 is replaced with only battery power supplied (no power on the 115
VAC TRANSFER BUSES) and the STANDBY POWER switch in the AUTO position,
the TR UNIT and ELEC lights on the P5-13 panel will come on.
(a) The TR UNIT light will go off after GCU 2, G12 is installed and its associated circuit
breaker is closed.
(b) The ELEC light will remain on until you clear the BAT CHGR INOP message.
1) To clear the BAT CHGR INOP message, do this task: P5-13 ELEC light Message
BITE Procedure (FIM 24-31 TASK 801).
ILF ALL
H. Put the airplane back to its usual condition.
SUBTASK 24-21-81-010-002
(1) Close this access panel:
Number Name/Location
117A Electronic Equipment Access Door
SUBTASK 24-21-81-760-001
(2) If its no longer needed, remove external power source from the airplane
(TASK 24-22-00-860-814).
SUBTASK 24-21-81-860-006
(3) Set the BAT switch on the P5-13 panel to the OFF position.
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-21-81
Page 411
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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