On-wing Preservation/Return to Service of the Batteries

TASK 24-38-00-550-801-A
On-wing Preservation/Return to Service of the Batteries

ZONE: 822
FIN: 2PB1
FIN: 2PB2

1. Reason for the Job
This procedure gives the instructions necessary to do the on-wing preservation of the batteries for a parking period for more than 2 days.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	FLASHLIGHT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
822	LATERAL AVIONICS COMPT DOOR (RIGHT)
822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-38-51-000-001-A	Removal of the Battery
TASK 24-38-51-400-001-A	Installation of the Battery
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 31-21-00-750-002-A	Procedure to Set the Clock
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access

3. Job Set-up
Subtask 24-38-00-010-054-A

A. Get Access
(1) Open the access door 822 (Ref. AMM TASK 52-41-00-010-002).
(2) Open the access panel of the BATTERY power center 105VU.

4. Procedure
Subtask 24-38-00-620-050-A

A. On-wing Preservation of the Batteries
(1) In the cockpit, on the ELEC panel 35VU;
(a) Release the BAT1 and BAT2 pushbutton switches (OFF legends on).
(b) Make sure that the batteries voltmeters show more than 26VDC.
(2) If one of the batteries voltage is less than 26VDC, do a charging cycle of BAT 1 and BAT 2 with the serviceable BCL 1(2), go to Para 4.D..
Then, continue this procedure.
(3) If the batteries voltage is more than 26VDC, push the BAT1 and BAT2 pushbutton switches (OFF legends off).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(5) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

NOTE: This step is only necessary to have light in the avionic bay and in the cockpit. If a torch is used to perform this procedure, this step can be disregarded.

Subtask 24-38-00-865-055-A

B. Open, safety and tag this(these) circuit breaker(s):

NOTE: Do this step immediately after the check of the battery voltmeters and the de-energization of the aircraft electrical circuits.

NOTE: Parking brake's hydraulic system cannot be pressurized/depressurized.

NOTE: The horn does not operate.

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 2PB1 (BAT1)
105VU	ELEC/HOT BUS/701PP SPLY	5PB1	D01
105VU	ELEC/HOT BUS/701PP SPLY	12PB1	E01
FOR FIN: 2PB2 (BAT2)
105VU	ELEC/HOT BUS/702PP SPLY	5PB2	D02
105VU	ELEC/HOT BUS/702PP SPLY	12PB2	E02

Subtask 24-38-00-860-057-A

C. Aircraft Maintenance Configuration
(1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(2) Go to Para. 5.

NOTE: If you use a FLASHLIGHT to get access to the avionics bay, steps 4. (C). (1) and 4. (C). (2) are not necessary.

(3) In the cockpit, on overhead panel 35VU, put the WARNING NOTICE(S) in position to tell persons not to use the batteries.

Subtask 24-38-00-760-050-A

D. Charging Cycle of Battery 1(2) with Serviceable BCL1(2)

NOTE: This procedure is applicable when the battery voltage is less than 26VDC.

(1) If the BAT 1(2) voltmeter of ELEC panel 35VU shows a voltage less than 21VDC:

Remove the battery and send it to the workshop, or
Replace the battery (Ref. AMM TASK 24-38-51-000-001) and (Ref. AMM TASK 24-38-51-400-001).

(2) If the BAT 1(2) voltmeter of ELEC panel 35VU shows a voltage more than or equal to 21VDC:

Continue the procedure as follows:

(a) Make sure that the aircraft is energized:

If it is not energized, energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
If it is energized, do the steps that follow:

(b) On the ECAM control panel:

Push the ELEC key to get the "ELEC" page.

Make sure that the BAT 1 and BAT 2 pushbutton switches are pushed (the OFF and FAULT legends are off) to start the charging cycle of battery 1(2).

(d) If the APU is the only power source, go to step 4. D. (2). (f).
(e) On the APU section of overhead control and indicating panel 25VU, if a different power source than the APU energizes the aircraft:

Push the APU MASTER SW pushbutton switch (the ON legend comes on).
Wait for two seconds.
Release the APU MASTER SW pushbutton switch (the ON legend goes off).

(f) On the lower ECAM Display Unit (DU), make sure that:

The green line between the "BAT 1(2)" indication and the "DC BAT" busbar indication comes into view.
The arrows points to the "BAT 1(2)" indication.
The "voltage" and "current" parameter indications come into view in green color.

(g) Wait until the battery contactor opens.
1 Make sure that the green line between the "BAT 1(2)" indication and the "DC BAT" busbar indication:

Goes out of view if the battery is correctly charged.
Comes into view if it is necessary to charge the battery.

NOTE: The time necessary for the charging of the battery is approximately 30 minutes.

(h) On the lower ECAM DU, on the "ELEC" page, make sure that:

The battery voltage is more than 26VDC.
The battery discharge current is less than or equal to 1A.

1 If the battery voltage is less than 26VDC:

Do this procedure again, or
Replace the battery (Ref. AMM TASK 24-38-51-000-001) and (Ref. AMM TASK 24-38-51-400-001).

2 If the battery voltage is more than 26VDC:

Do the preservation of the battery (refer to Para. 4. A. thru Para. 4. C.), or
Send the battery to service (refer to Para. 4. E.).

Subtask 24-38-00-630-050-A

E. Batteries Back to Service
(1) Remove the WARNING NOTICE(S).
(2) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

NOTE: If you use a flashlight to get access to the avionics bay, step 4. E. (2) is not necessary.

(3) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
(a) FOR [2PB1] (BAT-1)
5PB1 and 12PB1.
(b) FOR [2PB2] (BAT-2)
5PB2 and 12PB2.
(4) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(5) In the cockpit, on ELEC panel 35VU:
(a) Make sure that the BAT 1 and BAT 2 pushbutton switches are released (the OFF legends are on).
(b) Make sure that the battery voltmeters show more than 26VDC.
(6) If one of the battery voltages is less than 26VDC:

Do a charging cycle of battery 1(2) with serviceable BCL1(2).
Go to Para 4. D.
Then, continue this procedure.

(7) Make sure that the aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(8) Make sure that the BAT 1 and BAT 2 pushbutton switches are pushed (the OFF legends are off).
(9) Adjust the clock (Ref. AMM TASK 31-21-00-750-002).

5. Close-up
Subtask 24-38-00-410-054-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panel of the BATTERY power center 105VU.
(3) Close the access door 822 (Ref. AMM TASK 52-41-00-410-002).

[Rev.10 from 2021] 2026.04.01 04:24:20 UTC