Installation of the Seat/Wall-Mounted Emergency Light

TASK 33-51-19-400-003-A
Installation of the Seat/Wall-Mounted Emergency Light

NOTE: The procedure is the same for all the seat/wall-mounted emergency lights.

FIN: 800WL ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
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 33-51-00-710-001-A	Operational Check of the Emergency Power Supply Units by BITE-Check
Seat/Wall-Mounted Emergency Light

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 33-51-19-860-059-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that EMER EXIT LT switch 4WL on overhead panel 25VU is in the OFF position.
(2) Make sure that the LIGHT EMER pushbutton switch and its integral light on forward attendant panel 120RH are off.

Subtask 33-51-19-865-055-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 33-51-19-420-052-C ** ON A/C NOT FOR ALL

A. Installation of the Seat-Mounted Emergency Light (AIRSIGNA-LED)
(1) Installation of the Light Assembly

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.

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.

(a) Connect the electrical connectors (3) to the light housing (2).
(b) Install the light housing (2) to the related passenger seat.
Make sure that you hear a click when the light housing (2) locks in place.

Subtask 33-51-19-420-053-C ** ON A/C NOT FOR ALL

B. Installation of the Wall-Mounted Emergency Light (Edge-Light)
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the electrical connectors (7) to the light housing (6).
(4) Install the light housing (6) with the washers (5) and the screws (4).

Subtask 33-51-19-861-052-A ** ON A/C NOT FOR ALL

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

Subtask 33-51-19-865-056-A ** ON A/C NOT FOR ALL

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

Subtask 33-51-19-710-053-A ** ON A/C NOT FOR ALL

E. Do the operational test of the cabin emergency lights (Ref. AMM TASK 33-51-00-710-001).

5. Close-up
Subtask 33-51-19-860-058-A ** ON A/C NOT FOR ALL

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.9 from 2019] 2026.04.01 00:57:38 UTC