Removal of the Emergency Exit Location-Sign

TASK 33-51-17-000-001-A
Removal of the Emergency Exit Location-Sign

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.

FIN: 50WL ** ON A/C NOT FOR ALL
FIN: 500WL ** ON A/C NOT FOR ALL
FIN: 51WL ** ON A/C NOT FOR ALL
FIN: 510WL ** ON A/C NOT FOR ALL
FIN: 52WL ** ON A/C NOT FOR ALL
FIN: 520WL ** ON A/C NOT FOR ALL
FIN: 53WL ** ON A/C NOT FOR ALL
FIN: 530WL ** ON A/C NOT FOR ALL
FIN: 54WL ** ON A/C NOT FOR ALL
FIN: 540WL ** ON A/C NOT FOR ALL
FIN: 55WL ** ON A/C NOT FOR ALL
FIN: 550WL ** 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	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	STEPLADDER 1.0 M (3.3 FT)

B. Referenced Information

REFERENCE	DESIGNATION
Emergency Exit Location Sign ** ON A/C NOT FOR ALL
Emergency Exit Location Sign ** ON A/C NOT FOR ALL
Emergency Exit Location Sign ** ON A/C NOT FOR ALL
Emergency Exit Location-Sign ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 33-51-17-865-050-A

A. Open, safety and tag 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 33-51-17-860-054-A ** ON A/C NOT FOR ALL

B. 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.
(4) Put the STEPLADDER 1.0 M (3.3 FT) in position at the applicable zone.

Subtask 33-51-17-860-054-D ** ON A/C NOT FOR ALL

B. 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 internal light are off.
(4) Put the STEPLADDER 1.0 M (3.3 FT) in position at the applicable zone.

Subtask 33-51-17-860-054-E ** ON A/C NOT FOR ALL

B. 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.
(4) Put the STEPLADDER 1.0 M (3.3 FT) in position at the applicable zone.

Subtask 33-51-17-860-054-F ** ON A/C NOT FOR ALL

B. 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.
(4) Put the STEPLADDER 1.0 M (3.3 FT) below the related emergency exit location-sign.

4. Procedure
Subtask 33-51-17-020-050-A

A. Removal of the Emergency Exit Location-Sign

NOTE: The procedure is the same for all emergency exit location-signs.

(1) Remove the emergency exit location-sign lens (1).
(2) Remove the screws (2) and the washers (3).
(3) Lower the emergency exit location-sign (4) to get access to the electrical connectors (5).

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF 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.

(4) Disconnect the electrical connectors (5).
(5) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(6) Remove the emergency exit location-sign (4).

[Rev.10 from 2021] 2026.04.01 00:57:29 UTC