Incorrect Discharge of the Battery 2

TASK 24-38-00-810-838-A
Incorrect Discharge of the Battery 2

1. Possible Causes

SEC-1 [1CE1]
SEC-2 [1CE2]
SEC-3 [1CE3]
PRESS SW-B HYD, FLT CTL [10CE1]
PRESS SW-G HYD, FLT CTL [10CE2]
PRESS SW-Y HYD, FLT CTL [10CE3]
SYSTEM-PRESS-SW [1151GN]
SYSTEM-PRESS-SW [2151GN]
SYSTEM-PRESS-SW [3151GN]
RELAY-ELAC 2 EMER SPLY [48CE]
RELAY-ELAC 1 BATT SPLY BREAKING [35CE]
RELAY-SEC1 BATT SPLY BREAKING
ELAC-2 [2CE2]
BCL-2 [1PB2]
BAT-2 [2PB2]

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	AMMETER - DIGITAL
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
ASM 243802
AMM 24-38-34-000-001	Removal of the Battery Charge Limiter (BCL)
AMM 24-38-34-400-001	Installation of the Battery Charge Limiter (BCL)
AMM 24-38-51-000-001	Removal of the Batteries
AMM 24-38-51-400-001	Installation of the Batteries
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
ASM 279201
ASM 279202
AIPC 27920803
AMM 27-92-17-000-001	Removal of the Flight Control Pressure Switch
AMM 27-92-17-000-002	Removal of the Flight Control Pressure Switch
AMM 27-92-17-000-003	Removal of the Flight Control Pressure Switch
AMM 27-92-17-400-001	Installation of the Flight Control Pressure Switch
AMM 27-92-17-400-002	Installation of the Flight Control Pressure Switch
AMM 27-92-17-400-003	Installation of the Flight Control Pressure Switch
ASM 279227
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)
AMM 29-10-00-864-001	Depressurize the Green Hydraulic System
AMM 29-10-00-864-002	Depressurize the Yellow Hydraulic System
AMM 29-10-00-864-003	Depressurize the Blue Hydraulic System
AMM 29-32-12-000-001	Removal of the System Pressure Switch
AMM 29-32-12-000-002	Removal of the System Pressure Switch
AMM 29-32-12-000-003	Removal of the System Pressure Switch
AMM 29-32-12-400-001	Installation of the System Pressure Switch
AMM 29-32-12-400-002	Installation of the System Pressure Switch
AMM 29-32-12-400-003	Installation of the System Pressure Switch

3. Fault Confirmation
Subtask 24-38-00-710-114-A

A. In the cockpit, on the overhead ELEC panel 35VU, do a check of the battery voltage on the BAT2 voltmeter.

4. Fault Isolation
Subtask 24-38-00-865-052-A

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
105VU	ELEC/HOT BUS/702PP SPLY	5PB2	D02
105VU	ELEC/HOT BUS/702PP SPLY	12PB2	E02
105VU	ELEC/BAT REF/BCL2	9PB2	F02
105VU	ELEC/STAT INV/CNTOR/CTL	14XB	G02
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 24-38-00-810-102-A

B. If the voltage is less than 25.5 V, do a check to find if the problem comes from the Spoiler Elevator Computers (SEC).
(1) Make sure that the three hydraulic systems are not pressurized AMM 29-10-00-864-001, AMM 29-10-00-864-002 and AMM 29-10-00-864-003.
(2) Make sure that the ELAC 1 (2CE1), ELAC 2 (2CE2), SEC 1 (1CE1), SEC 2 (1CE2) and SEC 3 (1CE3) are correctly racked and powered.
(3) Open the circuit breaker ELAC 2 NORM SPLY (15CE2).
(4) After 30 seconds, on the FLT control panel 24VU, do a check of the FAULT legend of the FLT CTL/ELAC 2 pushbutton switch (6CE2).
(a) If the FAULT legend is off:

remove the SEC 1 (1CE1)
after 30 seconds, on the FLT control panel 24VU, do a check of the FAULT legend of the FLT CTL/ELAC 2 pushbutton switch.

1 If the FAULT legend comes on:

replace the SEC-1 [1CE1] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.

2 If the FAULT legend is off:

remove the SEC 2 (1CE2)
after 30 seconds, on the FLT control panel 24VU, do a check of the FAULT legend of the FLT CTL/ELAC 2 pushbutton switch.

a If the FAULT legend comes on:

replace the SEC-2 [1CE2] AMM 27-94-34-000-001 and AMM 27-94-34-400-001

b If the FAULT legend is off:

remove the SEC 3 (1CE3)
after 30 seconds, on the FLT control panel 24VU, do a check of the FAULT legend of the FLT CTL/ELAC 2 pushbutton switch.
. If the FAULT legend comes on:
- replace the SEC-3 [1CE3] AMM 27-94-34-000-001 and AMM 27-94-34-400-001

(5) Install all the removed SEC's.
(6) Close the circuit breaker ELAC 2 NORM SPLY (15CE2).

Subtask 24-38-00-810-103-A

C. If the voltage is less than 25.5 V, do a check to find if the problem comes from the ELAC 2 hydraulic discrete-inputs.
(1) Make sure that the three hydraulic systems are not pressurized AMM 29-10-00-864-001, AMM 29-10-00-864-002 and AMM 29-10-00-864-003.
(2) Remove the ELAC 1 (2CE1), ELAC 2 (2CE2), SEC 1 (1CE1), SEC 2 (1CE2) and SEC 3 (1CE3) from their rack.
(3) Do a check of a ground signal or an open circuit at the discrete inputs DSI 40, 42 and 32 of the ELAC 2 rack when the hydraulic pressure state is low ASM 279227.
(a) If a ground signal or an open circuit is found at one discrete input:

repair the related wiring between the ELAC 2 and the first terminal block.

(4) Install all the removed ELAC's and SEC's.

Subtask 24-38-00-810-089-A

D. If the voltage is less than 25.5 V and the problem does not come from the Spoiler Elevator Computers (SEC) and from the ELAC 2 hydraulic discrete-inputs:

do the BITE test of the EFCS (Ground scanning) AMM 27-96-00-740-001.

NOTE: Do this test procedure with the hydraulic systems not pressurized.

(1) If there is a maintenance message related to these pressure switches:

PRESS SW-B HYD, FLT CTL [10CE1] ,
PRESS SW-G HYD, FLT CTL [10CE2] ,
PRESS SW-Y HYD, FLT CTL [10CE3] ,
SYSTEM-PRESS-SW [1151GN] ,
SYSTEM-PRESS-SW [2151GN] ,
SYSTEM-PRESS-SW [3151GN] ,
Do the trouble shooting procedure related to the maintenance message.

(2) If there is no maintenance message related to the hydraulic pressure switches:

in the cockpit, on the ELEC panel 35VU, release the BAT2 pushbutton switch and put a WARNING NOTICE(S) to tell persons not to operate the battery 2,
in the battery power center 105VU, disconnect the cable between the BAT2 shunt (3PB2) and the ground: for this, remove the bolt and washer from the shunt ASM 243802,
connect an AMMETER - DIGITAL to the disconnected cable and the disconnected terminal of the shunt: make sure that the polarities of the tool are correct,
in the cockpit, in the ELEC panel 35VU, push the BAT2 pushbutton switch and remove the WARNING NOTICE(S),
do a check of the current value.

(a) If the current is more than 400 mA:

open the circuit breaker 16CE2 while you monitor the current value ASM 279201.

1 If the current value suddenly falls below 400mA when you open the circuit breaker:

disconnect one by one the electrical connectors from these pressure switches ASM 279227:
- SYSTEM-PRESS-SW [2151GN] AMM 29-32-12-000-002,
- SYSTEM-PRESS-SW [3151GN] AMM 29-32-12-000-003,
- SYSTEM-PRESS-SW [1151GN] AMM 29-32-12-000-001,
- PRESS SW-B HYD, FLT CTL [10CE1] AMM 27-92-17-000-003,
- PRESS SW-Y HYD, FLT CTL [10CE3] AMM 27-92-17-000-002,
- PRESS SW-G HYD, FLT CTL [10CE2] AMM 27-92-17-000-001,
while you monitor the current value after you closed the circuit breaker 16CE2.

a If after you disconnected the SYSTEM-PRESS-SW [2151GN] the current value is less than 400mA:

replace the SYSTEM-PRESS-SW [2151GN] ,
AMM 29-32-12-000-002 AMM 29-32-12-400-002 and connect all the electrical connectors that you disconnected.

b If after you disconnected the SYSTEM-PRESS-SW [3151GN] , the current value is less than 400mA:

replace the SYSTEM-PRESS-SW [3151GN] ,
AMM 29-32-12-000-003 AMM 29-32-12-400-003 and connect all the electrical connectors that you disconnected.

c If after you disconnected SYSTEM-PRESS-SW [1151GN] , the current value is less than 400mA:

replace the SYSTEM-PRESS-SW [1151GN] ,
AMM 29-32-12-000-001 AMM 29-32-12-400-001 and connect all the electrical connectors that you disconnected.

d If after you disconnected the PRESS SW-B HYD, FLT CTL [10CE1] , the current value is less than 400mA:

replace the PRESS SW-B HYD, FLT CTL [10CE1] ,
AMM 27-92-17-000-003 AMM 27-92-17-400-003 and connect all the electrical connectors that you disconnected.

e If after you disconnected the PRESS SW-Y HYD, FLT CTL [10CE3] , the current value is less than 400mA:

replace the PRESS SW-Y HYD, FLT CTL [10CE3] ,
AMM 27-92-17-000-002 AMM 27-92-17-400-002 and connect all the electrical connectors that you disconnected.

f If after you disconnected the PRESS SW-G HYD, FLT CTL [10CE2] , the current value is less than 400mA:

replace the PRESS SW-G HYD, FLT CTL [10CE2] ,
AMM 27-92-17-000-001 AMM 27-92-17-400-001 and connect all the electrical connectors that you disconnected.

g If the current value is more than 400mA:

open the circuit breaker 16CE2,
connect the electrical connector to these pressure switches:
- SYSTEM-PRESS-SW [2151GN] AMM 29-32-12-400-002,
- SYSTEM-PRESS-SW [3151GN] AMM 29-32-12-400-003,
- SYSTEM-PRESS-SW [1151GN] AMM 29-32-12-400-001,
- PRESS SW-B HYD, FLT CTL [10CE1] AMM 27-92-17-400-003,
- PRESS SW-Y HYD, FLT CTL [10CE3] AMM 27-92-17-400-002,
- PRESS SW-G HYD, FLT CTL [10CE2] AMM 27-92-17-400-001,
disconnect the RELAY (48CE) AIPC 27920803, ASM 279202,
close the circuit breaker 16CE2,
do a check of the current value:
. If the current value is less than 400mA:
- open the circuit breaker 16CE2,
- replace the RELAY-ELAC 2 EMER SPLY [48CE] , AIPC 27920803
- close the circuit breaker 16CE2,
- do a check of the current value:
. If the current value is more than 400mA:
- open the circuit breaker 16CE2,
- disconnect the relay (35CE) AIPC 27920803.
- close the circuit breaker 16CE2,
- do a check of the current value:
* If the current value is less than 400mA:
- open the circuit breaker 16CE2,
- replace the RELAY-ELAC 1 BATT SPLY BREAKING [35CE] and install the relay 48CE AIPC 27920803
- close the circuit breaker 16CE2,
- do a check of the current value:
* If the current value is more than 400mA:
- open the circuit breaker 16CE2,
- replace the RELAY-SEC1 BATT SPLY BREAKING and install the relay (48CE) and relay (35CE) AIPC 27920803.

2 If the current value stays more than 400mA:

open other circuit breakers (5PB2, 12PB2, 9PB2, 6FP1 and 14XB) one by one while you monitor the current value.

a If the current value suddenly falls below 400mA when you open a circuit breaker:

do a check of the system related to this circuit breaker to find the cause of this overconsumption.

b If the current value is more than 400mA when all circuit breakers are open

replace the ELAC-2 [2CE2] , AMM 27-93-34-000-001 AMM 27-93-34-400-001.

(b) If the current is less than 400mA:

replace the BCL-2 [1PB2] , AMM 24-38-34-000-001 and AMM 24-38-34-400-001.

1 If the fault continues:

replace the BAT-2 [2PB2] , AMM 24-38-51-000-001 AMM 24-38-51-400-001 ASM 243802.

Subtask 24-38-00-860-058-A

E. Put the aircraft back to the serviceable condition.
(1) In the cockpit, on the ELEC panel 35VU, release the BAT2 pushbutton switch and put a WARNING NOTICE(S) to tell persons not to operate the battery 2.
(2) In the battery power center 105VU, remove the AMMETER - DIGITAL between the shunt and ground cable.
(3) Connect the ground cable to the shunt and attach it with the washer and bolt.
(4) In the cockpit, on the ELEC panel 35VU, push the BAT2 pushbutton switch and remove the WARNING NOTICE(S).

NOTE: After you have isolated the fault, it is necessary to charge the BAT2.

(5) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.

Subtask 24-38-00-710-115-A

F. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:39:04 UTC