Installation of the Cabin Emergency Light

TASK 33-51-11-400-001-A
Installation of the Cabin Emergency Light

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.

FIN: 20WL
FIN: 200WL
FIN: 201WL
FIN: 202WL
FIN: 203WL
FIN: 204WL
FIN: 205WL
FIN: 206WL
FIN: 207WL ** ON A/C NOT FOR ALL
FIN: 208WL ** ON A/C NOT FOR ALL
FIN: 209WL ** ON A/C NOT FOR ALL
FIN: 21WL
FIN: 210WL ** ON A/C NOT FOR ALL
FIN: 32WL
FIN: 33WL
FIN: 34WL ** ON A/C NOT FOR ALL
FIN: 35WL ** ON A/C NOT FOR ALL
FIN: 36WL ** ON A/C NOT FOR ALL
FIN: 37WL ** ON A/C NOT FOR ALL
FIN: 70WL1 ** ON A/C NOT FOR ALL
FIN: 70WL2 ** ON A/C NOT FOR ALL
FIN: 70WL3 ** ON A/C NOT FOR ALL
FIN: 70WL4 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
241FW, 242FW
241CW, 241LW, 242CW, 242LW

B. Referenced Information

REFERENCE	DESIGNATION
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 Emergency Light ** ON A/C NOT FOR ALL
Cabin Emergency Light ** ON A/C NOT FOR ALL
Cabin Emergency Light ** ON A/C NOT FOR ALL
Cabin Emergency Light ** ON A/C NOT FOR ALL
Cabin Emergency Light ** ON A/C NOT FOR ALL
Cabin Emergency Light - Escape-Hatch Handle Lighting ** ON A/C NOT FOR ALL
Cabin Emergency Light - Escape-Hatch Handle Lighting ** ON A/C NOT FOR ALL
Cabin Emergency Light - Escape-Hatch Handle Lighting ** 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 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 33-51-11-860-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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 lights are off.

Subtask 33-51-11-860-054-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 light are off.

Subtask 33-51-11-860-054-E ** ON A/C NOT FOR ALL

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

Subtask 33-51-11-860-054-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 button and its light are off.

Subtask 33-51-11-010-054-A ** ON A/C NOT FOR ALL

B. Make sure that access panels 241CW 242CW 241LW 242LW are open.

Subtask 33-51-11-010-054-B ** ON A/C NOT FOR ALL

B. Make sure that access panels 241FW 242FW are open.

Subtask 33-51-11-865-053-A

C. 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 33-51-11-910-050-A

A. Preparation for Installation
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.

Subtask 33-51-11-420-050-B ** ON A/C NOT FOR ALL

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. Installation of the Cabin Emergency Light

Cabin Emergency Light ** ON A/C NOT FOR ALL

(1) Installation of the Cabin Emergency-Light Assembly mounted in the Ceiling
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connector (2) to the light housing (5).
(c) Install the light housing (5) with the screws (1).
(d) Install the lens (4) to the light housing (5).
Make sure that you hear a click when the lens (4) locks in position.
(2) Installation of the Cabin Emergency-Light Assembly mounted in the Door-Area
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (8) to the light housing (7).
(c) Install the light housing (7).
Make sure that you hear a click when the light housing (7) locks in position.
(d) Install the lens (6) to the light housing (7).
Make sure that you hear a click when the lens (6) locks in position.
(3) Installation of the Bulb(s) of the Cabin Emergency Light
(a) Install the bulb(s) (3) and (10) in the light housing (5) and (7).
(b) Install the lens (4) and (6) to the light housing (5) and (7).
Make sure that you hear a click when the lens (4) and (6) locks in position.

Subtask 33-51-11-420-050-D ** ON A/C NOT FOR ALL

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. Installation of the Cabin Emergency Light

Cabin Emergency Light ** ON A/C NOT FOR ALL

(1) Installation of the Cabin Emergency-Light Assembly mounted in the Ceiling
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connector (2) to the light housing (4).
(c) Install the light housing (4) with the screws (1).
(d) Install the lens (3) to the light housing (4).
Make sure that you hear a click when the lens (3) locks in position.
(2) Installation of the Cabin Emergency-Light Assembly mounted in the Door-Area
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (7) and (9) to the light housing (6) and (10).
(c) Install the light housing (6) and (10).
Make sure that you hear a click when the light housing (6) and (10) locks in position.
(d) Install the lens (5) and (12) to the light housing (6) and (10).
Make sure that you hear a click when the lens (5) and (12) locks in position.

Subtask 33-51-11-420-050-E ** ON A/C NOT FOR ALL

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. Installation of the Cabin Emergency Light

Cabin Emergency Light ** ON A/C NOT FOR ALL

CAUTION: WHEN YOU INSTALL THE LIGHT HOUSING, REFER TO THE MATCH MARKS ON THE ATTACHMENT CLIPS OF THE LIGHT HOUSING MADE DURING THE REMOVAL. THIS WILL PREVENT DAMAGE TO THE LIGHT HOUSING BECAUSE OF INCORRECT INSTALLATION.

(c) Install the light housing (6).
Make sure that you hear a click when the light housing (6) locks in position.
(d) Install the lens (5) to the light housing (6).
Make sure that you hear a click when the lens (5) locks in position.

Subtask 33-51-11-420-050-G ** ON A/C NOT FOR ALL

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. Installation of the cabin emergency light

Cabin Emergency Light ** ON A/C NOT FOR ALL

(1) Installation of the cabin emergency-light assembly installed in the ceiling
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (4) to the faston tabs (1).
(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.
(2) Installation of the Cabin Emergency-Light Assembly installed in the Door-Area
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (7) and (9) to the light housing (6) and (10).

(c) Install the light housings (6) and (10).
Make sure that you hear a click when the light housing (6) and (10) locks in position.
(d) Install the lens (5) and (12) on the light housing (6) and (10).
Make sure that you hear a click when the lens (5) and (12) locks in position.

Subtask 33-51-11-420-050-H ** ON A/C NOT FOR ALL

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. Installation of the Cabin Emergency Light

Cabin Emergency Light ** ON A/C NOT FOR ALL

(1) Installation of the Cabin Emergency-Light Assembly installed in the Ceiling
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (4) to the Faston tabs (1).
(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.
(2) Installation of the Cabin Emergency-Light Assembly installed in the Door-Area
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Connect the electrical connectors (7) to the light housing (6).

(c) Install the light housing (6).
Make sure that you hear a click when the light housing (6) locks in position.
(d) Install the lens (5) on the light housing (6).
Make sure that you hear a click when the lens (5) locks in position.

Subtask 33-51-11-420-052-A ** ON A/C NOT FOR ALL

C. Installation of the Escape Hatch-Handle Light

Cabin Emergency Light - Escape-Hatch Handle Lighting ** ON A/C NOT FOR ALL

(1) Installation of the Escape Hatch-Handle Light-Assembly
(a) Install the escape hatch-handle light (15).
Make sure that you hear a click when the escape hatch-handle light (15) locks in position.
(b) 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.

(c) Connect the electrical connectors (19) to the escape-hatch handle light (15).
(2) Installation of the Bulb(s) of the Escape Hatch-Handle Light
(a) Install the bulb(s) (16) in the light housing.
(b) Install the lens (17) to the light housing.

Subtask 33-51-11-420-052-B ** ON A/C NOT FOR ALL

C. Installation of the Escape Hatch-Handle Light

Cabin Emergency Light - Escape-Hatch Handle Lighting ** ON A/C NOT FOR ALL

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.

Subtask 33-51-11-865-051-A

D. 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 33-51-11-861-050-A

E. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 33-51-11-710-050-A

F. Operational Test
(1) Do this 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 related emergency light comes on.
2.In the cockpit, on SIGNS panel 25VU: Set EMER EXIT LT switch 4WL to the OFF position.	In the cockpit, on SIGNS panel 25VU: EMER EXIT LT OFF annunciator 5WL comes on. In the cabin: The related emergency light goes off.

5. Close-up
Subtask 33-51-11-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install access panels 241CW 242CW 241LW 242LW.

Subtask 33-51-11-410-053-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install access panels 241FW 242FW.

Subtask 33-51-11-862-050-A

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

[Rev.10 from 2021] 2026.04.01 00:57:20 UTC