Installation of the Cabin Wall-Mounted Emergency-Exit-Markers

TASK 33-51-13-400-001-A
Installation of the Cabin Wall-Mounted Emergency-Exit-Markers

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

NOTE: The procedure is the same for all wall-mounted emergency-exit-markers.

FIN: 90WL1 ** ON A/C NOT FOR ALL
FIN: 90WL2 ** ON A/C NOT FOR ALL
FIN: 90WL3 ** ON A/C NOT FOR ALL
FIN: 90WL4 ** ON A/C NOT FOR ALL
FIN: 90WL5 ** ON A/C NOT FOR ALL
FIN: 90WL6 ** ON A/C NOT FOR ALL
FIN: 90WL7 ** ON A/C NOT FOR ALL
FIN: 90WL8 ** ON A/C NOT FOR ALL
FIN: 95WL1 ** ON A/C NOT FOR ALL
FIN: 95WL10 ** ON A/C NOT FOR ALL
FIN: 95WL2 ** ON A/C NOT FOR ALL
FIN: 95WL3 ** ON A/C NOT FOR ALL
FIN: 95WL4 ** ON A/C NOT FOR ALL
FIN: 95WL5 ** ON A/C NOT FOR ALL
FIN: 95WL6 ** ON A/C NOT FOR ALL
FIN: 95WL7 ** ON A/C NOT FOR ALL
FIN: 95WL8 ** ON A/C NOT FOR ALL
FIN: 95WL9 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ELEC CONTACTS INSERTION EXTRACTION TOOL M15.570-22

B. 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)
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL
Cabin Wall-Mounted Emergency-Exit-Markers ** ON A/C NOT FOR ALL

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 the 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 33-51-13-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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 SMOKING switch 190RH is in the OFF position.
(3) On Forward Attendant Panel (FAP) 120RH, make sure that the LIGHT EMER pushbutton switch and its integral light are off.

Subtask 33-51-13-860-055-D ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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 SMOKING switch 190RH is in the OFF position.
(3) On Flight Attendant Panel (FAP) 120RH, make sure that the EMER pushbutton and its integral light are off.

Subtask 33-51-13-860-055-E ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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 33-51-13-860-055-F ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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 and its internal light are off.

Subtask 33-51-13-865-055-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 33-51-13-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Cabin Wall-Mounted Emergency-Exit-Markers

WARNING: WHEN YOU INSTALL THE EMERGENCY LIGHT OR THE LIGHT LENS, MAKE SURE THAT IT POINTS TO THE FLOOR. IF IT DOES NOT POINT TO THE FLOOR, THERE IS A RISK THAT, DURING EVACUATION: - THE PASSENGERS WILL GET THE LIGHT IN THEIR EYES - THE PASSENGERS WILL NOT SEE THE EMERGENCY ESCAPE PATH CORRECTLY.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Installation of the Emergency-Exit-Marker Assembly
(a) Make sure that all the electrical connections are clean and in the correct condition.
(b) Connect the electrical connectors (5) to the light housing (2).
(c) Install the light housing (2) with the reflectors at the top to the wall panel.
Make sure that you hear a click when the light housing (2) locks in position.
(d) Install the lens (4) to the light housing (2).
Make sure that you hear a click when the lens (4) locks in position.
(4) Installation of the Bulb(s) of the Emergency-Exit-Marker
(a) Install the bulb(s) (3) in the light housing (2).
(b) Install the lens (4) to the light housing (2).
Make sure that you hear a click when the lens (4) locks in position.

Subtask 33-51-13-420-050-C ** ON A/C NOT FOR ALL

A. Installation of the Cabin Wall-Mounted Emergency-Exit Markers

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Install the emergency-exit-marker assembly:
(a) Make sure that all the electrical connections are clean and in the correct condition.

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(b) Cut and discard the ends of the electrical connections (4).
(c) Connect the electrical connections (7) with the ELEC CONTACTS INSERTION EXTRACTION TOOL M15.570-22.
(d) Install the light housing (6) with the washers (2) and the screws (3) to the wall panel.
(e) Install the lens (5) with the screw (4) to the light housing (6).
(4) Install the bulb(s) of the emergency-exit-marker:
(a) Install the bulb(s) (1) in the light housing (6).
(b) Install the lens (5) with the screw (4) to the light housing (6).

Subtask 33-51-13-420-050-E ** ON A/C NOT FOR ALL

A. Installation of the Cabin Wall-Mounted Emergency-Exit-Markers

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Install the emergency-exit-marker assembly:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.

CAUTION: REFER TO THE MATCH MARKS MADE DURING THE REMOVAL WHEN YOU CONNECT THE ELECTRICAL WIRES. INCORRECT CONNECTION OF THE WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(b) Connect the electrical connectors (4) to the light housing (2).
(c) Install the light housing (2) on the wall panel.
Make sure that you hear a click when the light housing (2) locks in position.
(d) Install the lens (3) on the light housing (2).
Make sure that you hear a click when the lens (3) locks in position.

Subtask 33-51-13-865-051-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

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

Subtask 33-51-13-860-056-A ** ON A/C NOT FOR ALL

C. Preparation for the Test
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On overhead panel 25VU, make sure that NO SMOKING switch 190RH is in the OFF position.
(3) On overhead panel 25VU, make sure that EMER EXIT LT OFF annunciator light 5WL is on.

Subtask 33-51-13-860-056-B ** ON A/C NOT FOR ALL

C. Preparation for the Test
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On overhead panel 25VU, make sure that EXIT switch 190RH is in the OFF position.
(3) On overhead panel 25VU, make sure that EMER EXIT LT OFF annunciator light 5WL is on.

Subtask 33-51-13-860-056-C ** ON A/C NOT FOR ALL

C. Preparation for the Test
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On overhead panel 25VU, make sure that No PED switch 190RH is in the OFF position.
(3) On overhead panel 25VU, make sure that EMER EXIT LT OFF annunciator light 5WL is on.

Subtask 33-51-13-710-050-A

D. Operational Test
(1) Do the test of the wall-mounted emergency-exit-marker:

NOTE: The time taken to do this test should not exceed 3 min to prevent discharge of the emergency lighting batteries.

ACTION	RESULT
1.On overhead panel 25VU: Set EMER EXIT LT switch 4WL to the ON position.	On overhead panel 25VU: EMER EXIT LT OFF annunciator light 5WL goes off.
	In the cabin: The related wall-mounted emergency-exit-marker comes on.
2.On overhead panel 25VU: Set EMER EXIT LT switch 4WL to the OFF position.	On overhead panel 25VU: EMER EXIT LT OFF annunciator light 5WL comes on.
	In the cabin: The related wall-mounted emergency-exit-marker goes off.

5. Close-up
Subtask 33-51-13-860-053-A

A. Put the aircraft back to the serviceable condition.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 06:08:06 UTC