Check of all the Cabin Lights and Signs for Correct Illumination and Correct Installation

TASK 33-51-00-710-009-A
Check of all the Cabin Lights and Signs for Correct Illumination and Correct Installation

1. Reason for the Job
Do this check of the cabin lights and signs for maintenance.
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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 33-51-00-00	CABIN EMERGENCY LIGHTING - DESCRIPTION AND OPERATION

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 33-51-00-861-061-A

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 33-51-00-865-060-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 33-51-00-860-085-A ** ON A/C NOT FOR ALL

A. Preparation for Test
(1) On the overhead panel 25VU, make sure that the EMER EXIT LT switch 4WL is in the OFF position.
(2) On the overhead panel 25VU, make sure that the NO SMOKING switch 190RH is in the OFF position.
(3) On the Forward Attendant Panel (FAP) 120RH, make sure that the LIGHT EMER pushbutton switch and its integral light are off.

Subtask 33-51-00-860-085-D ** ON A/C NOT FOR ALL

A. Preparation for Test
(1) On the overhead panel 25VU, make sure that the EMER EXIT LT switch 4WL is in the OFF position.
(2) On the overhead panel 25VU, make sure that the NO SMOKING switch 190RH is in the OFF position.
(3) On the Flight Attendant Panel (FAP) 120RH, make sure that the EMER pushbutton switch and its integral light are off.

Subtask 33-51-00-860-085-E ** ON A/C NOT FOR ALL

A. Preparation for Test
(1) On overhead panel 25VU, make sure that EMER EXIT LT switch 4WL is in the OFF position.
(2) On overhead panel 25VU, make sure that EXIT switch 190RH is in the OFF position.
(3) On Flight Attendant Panel (FAP) 120RH, make sure that the EMER button and its light are off.

Subtask 33-51-00-860-085-F ** ON A/C NOT FOR ALL

A. Preparation for Test
(1) On overhead panel 25VU, make sure that EMER EXIT LT switch 4WL is in the OFF position.
(2) On overhead panel 25VU, make sure that No PED switch 190RH is in the OFF position.
(3) On Flight Attendant Panel (FAP) 120RH, make sure that the EMER pushbutton switch and its integral light are off.

Subtask 33-51-00-710-064-A ** ON A/C NOT FOR ALL

B. Test of both Control Panels and the Emergency Lighting System

NOTE: All the individual lamps in the cabin lights and signs must come on or go off as necessary during the subsequent test.

(1) For the locations of the emergency lights, refer to (Ref. AMM D/O 33-51-00-00).
(2) Do this test.

ACTION	RESULT
1.In the cockpit, on the SIGNS panel 25VU: Set the EMER EXIT LT switch 4WL to the ON position.	In the cockpit, on the SIGNS panel 25VU: The EMER EXIT LT OFF annunciator 5WL goes off.
	In the cabin: The signs and the lights of the emergency lighting system come on.
2.On the SIGNS panel 25VU: Set the EMER EXIT LT switch 4WL to the OFF position.	On the SIGNS panel 25VU: The EMER EXIT LT OFF annunciator 5WL comes on.
	In the cabin: The signs and the lights of the emergency lighting system go off.
3.On the FAP 120RH: Push the LIGHT EMER pushbutton switch.	On the FAP 120RH: The red light of the LIGHT EMER pushbutton switch comes on.
	In the cabin: The signs and the lights of the emergency lighting system come on.
4.On the FAP 120RH: Push the LIGHT EMER pushbutton switch.	On the FAP 120RH: The red light of the LIGHT EMER pushbutton switch goes off.
	In the cabin: The signs and the lights of the emergency lighting system go off.

Subtask 33-51-00-710-064-C ** ON A/C NOT FOR ALL

B. Test of the two Control Panels and the Emergency Lighting System

NOTE: All of the lamps in the cabin lights and signs must come on or go off as necessary during the subsequent test.

(1) For the locations of the emergency lights, refer to (Ref. AMM D/O 33-51-00-00).
(2) Do this test.

ACTION	RESULT
1.In the cockpit, on the SIGNS panel 25VU: set the EMER EXIT LT switch 4WL to the ON position.	In the cockpit, on the SIGNS panel 25VU: the EMER EXIT LT OFF annunciator 5WL goes off.
	In the cabin: the signs and lights of the emergency lighting system come on.
2.On the SIGNS panel 25VU: set the EMER EXIT LT switch 4WL to the OFF position.	On the SIGNS panel 25VU: the EMER EXIT LT OFF annunciator 5WL comes on.
	In the cabin: the signs and lights of the emergency lighting system go off.
3.On the FAP 120RH: push the LIGHT EMER pushbutton switch.	On the FAP 120RH: the red integral light of the LIGHT EMER pushbutton switch comes on.
	In the cabin: the signs and lights of the emergency lighting system come on.
4.On the FAP 120RH: push the LIGHT EMER pushbutton switch.	On the FAP 120RH: the red integral light of the LIGHT EMER pushbutton switch goes off.
	In the cabin: the signs and lights of the emergency lighting system go off.

Subtask 33-51-00-710-064-H ** ON A/C NOT FOR ALL

B. Operational Test
(1) For the locations of the emergency lights, refer to (Ref. AMM D/O 33-51-00-00).
(2) Do this test of the two control panels and the emergency lighting system:

NOTE: All of the lamps in the cabin lights and signs must come on or go off as necessary during the subsequent test.

ACTION	RESULT
1.In the cockpit, on SIGNS panel 25VU: Set EMER EXIT LT switch 4WL to the ON position.	In the cockpit, on SIGNS panel 25VU: EMER EXIT LT OFF annunciator 5WL goes off.
	In the cabin: The signs and the lights of the emergency lighting system come on.
2.On SIGNS panel 25VU: Set EMER EXIT LT switch 4WL to the OFF position.	On SIGNS panel 25VU: EMER EXIT LT OFF annunciator 5WL comes on.
	In the cabin: The signs and the lights of the emergency lighting system go off.
3.On FAP 120RH: Push the EMER pushbutton switch.	On FAP 120RH: The light of the EMER pushbutton switch comes on.
	In the cabin: The signs and the lights of the emergency lighting system come on.
4.On FAP 120RH: Push the EMER pushbutton switch.	On FAP 120RH: The light of the EMER pushbutton switch goes off.
	In the cabin: The signs and the lights of the emergency lighting system go off.

5. Close-up
Subtask 33-51-00-862-060-A

A. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 03:56:40 UTC