SUBTASK 24-31-11-860-042-002
(2) Make sure the STANDBY POWER switch on the P5-5 panel is in the AUTO position.
SUBTASK 24-31-11-210-003-002
(3) Make sure the ELEC light on the P5-13 panel is off.
(a) To clear ELEC light messages, do this task: P5-13 ELEC light Message BITE Procedure
(FIM 24-31 TASK 801).
SUBTASK 24-31-11-710-008-002
(4) Do these steps to test the main battery:
(a) Set the GRD PWR switch on the P5-4 panel to the OFF position.
(b) Make sure the BAT switch on the P5-13 panel is set to the ON position.
(c) Set the DC meter selector switch on the P5-13 panel to the BAT position.
(d) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 22-28
2) DC AMPS = a negative value
NOTE: The battery current is negative when the battery is discharging.
(e) Make sure the BAT DISCHARGE light on the P5-13 panel comes on. This light will come
on when any of these conditions are met:
1) The battery current is greater than 5 Amps for more than 95 seconds.
2) The battery current is greater than 15 Amps for more than 25 seconds.
3) The battery current is greater than 100 Amps for more than 1.2 seconds.
(f) Set the GRD PWR switch to the ON position.
(g) Make sure the DC AMPS value goes to 45 ±10 AMPS and then goes down to less than 5
AMPS within 180 minutes.
NOTE: 180 minutes is the maximum. It can take less time depending the state of the
battery.
(h) Make sure the DC VOLTS value goes to 30 ±3 VOLTS.
(i) Make sure the BAT DISCHARGE light goes off.
1) If the BAT DISCHARGE light stays on, then do these steps:
a) Set the GRD PWR switch on the P5-4 panel to the OFF position.
b) Do this task: APU Starting and Operation, TASK 49-11-00-860-801.
c) Do this task: APU Usual Shutdown, TASK 49-11-00-860-802.
d) Do the above test again.
SUBTASK 24-31-11-710-009-002
(5) Do these steps to test auxiliary battery:
(a) Set the GRD PWR switch on the P5-4 panel to the OFF position.
(b) Make sure the BAT switch on the P5-13 panel is set to the ON position.
(c) Set the DC meter selector switch on the P5-13 panel to the AUX BAT position.
(d) Make sure the DC meter on the P5-13 panel shows these values:
1) DC VOLTS = 22-28
2) DC AMPS = a negative value
NOTE: The battery current is negative when the battery is discharging.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-31-11
Config 2
Page 411
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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