Operational Check of Emergency Power Supply Units by BITE-Check

TASK 33-51-00-710-001-A
Operational Check of Emergency Power Supply Units by BITE-Check

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 335100-01
OPERATIONAL CHECK OF EMERGENCY POWER SUPPLY UNITS BY BITE-CHECK
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
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 31-32-00-860-003-A	Procedure to Get Access to the SYSTEM REPORT/TEST/COM Page

3. Job Set-up

CAUTION: DO NOT USE THE TEACH-IN PROCEDURE TO CLEAR EPSU FAILURE MESSAGES. THE TEACH-IN PROCEDURE IS NOT A SYSTEM RESET. IT CAN CHANGE THE EMERGENCY LIGHT CONFIGURATION AND CAUSE HIDDEN FAILURES.

NOTE: The teach-in procedure of the EPSUs measures and keeps the load values that are related to each EPSU. The EPSU controller refers to these load values when the BITE test of the emergency lighting system operates. Thus, it is necessary that the emergency lights of the related EPSUs operate correctly during the teach-in procedure.

Subtask 33-51-00-860-079-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Get access to the SYSTEM/REPORT/TEST COM Page : (Ref. AMM TASK 31-32-00-860-003).
(3) Make sure that the Cabin-Intercommunication Data System (CIDS) is energized (Ref. AMM TASK 23-73-00-861-001).
(4) On the Forward Attendant Panel (FAP) 120RH in the cabin, make sure that the pushbutton-switch EMER is released (position out/indicator light is off).
(5) On the overhead panel 25VU in the cockpit make sure that:

The switch 4WL EMER EXIT LT is in the OFF position
The switch 190RH NO SMOKING is in the OFF position
The indicator 5WL EMER EXIT LT OFF is on.

Subtask 33-51-00-860-079-D ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Get access to the SYSTEM/REPORT/TEST COM Page : (Ref. AMM TASK 31-32-00-860-003).
(3) Make sure that the Cabin-Intercommunication Data System (CIDS) is energized (Ref. AMM TASK 23-73-00-861-001).
(4) On the Flight Attendant Panel (FAP) 120RH in the cabin, make sure that the pushbutton-switch EMER is released (position out/indicator light is off).
(5) On the overhead panel 25VU in the cockpit make sure that:

The switch 4WL EMER EXIT LT is in the OFF position
The switch 190RH NO SMOKING is in the OFF position
The indicator 5WL EMER EXIT LT OFF is on.

Subtask 33-51-00-860-079-E ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the procedure to get access to the SYSTEM/REPORT/TEST COM Page: (Ref. AMM TASK 31-32-00-860-003).
(3) Make sure that the Cabin Intercommunication Data System (CIDS) is energized (Ref. AMM TASK 23-73-00-861-001).
(4) In the cabin on Flight Attendant Panel (FAP) 120RH, make sure that the EMER button is released (position out/indicator light is off).
(5) In the cockpit on overhead panel 25VU, make sure that:

EMER EXIT LT switch 4WL is in the OFF position
EXIT switch 190RH is in the OFF position
EMER EXIT LT OFF indicator 5WL is on.

Subtask 33-51-00-860-079-F ** ON A/C NOT FOR ALL

EMER EXIT LT switch 4WL is in the OFF position.
No PED switch 190RH is in the OFF position.
EMER EXIT LT OFF indicator 5WL is on.

Subtask 33-51-00-865-050-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CABIN	2WL	H06
49VU	LIGHTING/EMER LT/CABIN	1WL	H05
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CABIN	2WL	H04
49VU	LIGHTING/EMER LT/CABIN	1WL	H03
** ON A/C ALL
122VU	LIGHTING/CABIN/EMER/LT	3WL	V07

4. Procedure
Subtask 33-51-00-710-050-A ** ON A/C NOT FOR ALL

A. Test of the Emergency Lights
(1) Do this test:

ACTION	RESULT
1.On Programming and Test Panel (PTP) 110RH: Push the TEST EMER LIGHT/SYS membrane switch for not less than 3 seconds.	On PTP 110RH: The SYS OK light comes on after approx. 30 seconds.
	On the display of PTP 110RH: The EMER SYSTEM ATA 33-51-38 TEST OK status comes on. NOTE: If the SYS OK LED comes on, there are no limitations in the operation of the emergency light system. You can ignore all the associated messages for maintenance.
	On PTP 110RH: The SYS OK light goes off after approx. 60 s.

Subtask 33-51-00-710-050-B ** ON A/C NOT FOR ALL

A. Operational Test
(1) Do this test:

ACTION	RESULT
1.In the cockpit on the MCDU:	In the cockpit on the MCDU:
Push line select key CIDS 1.	The menu page CIDS 1 comes into view.
Push the line select key SYSTEM TESTS.	The menu page SYSTEM TESTS comes into view.
Push the line select key EPSU SYS TEST.	The menu page EPSU SYS TEST comes into view.
Push the line select key START TEST.	The system test starts and the message TEST IN PROGRESS 60S shows, then the message TEST OK shows.
Push the line select key RETURN until the menu page SYSTEM REPORT/TEST comes into view.

5. Close-up
Subtask 33-51-00-862-050-A

A. Put the aircraft back to the serviceable condition.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:57:04 UTC