Installation of the Door Lining on the Overwing Emergency Exit

TASK 25-23-47-400-803-A
Installation of the Door Lining on the Overwing Emergency Exit

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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
833, 834, 843, 844

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-21-41-000-001-A	Removal of the Passenger Seats
TASK 25-21-41-400-001-A	Installation of the Passenger Seats
TASK 25-62-00-081-001-A	Special Precautions after Work on the Offwing Escape-Slide Systems
TASK 25-62-00-481-001-A	Special Precautions before Work on the Offwing Escape-Slide Systems
TASK 52-22-00-410-802-A	Closing of the Overwing Emergency-Exit Door from the Passenger Compartment
TASK 52-73-00-710-002-E	Operational Test of the Warning System Related to the Emergency Exit Doors
Door Lining of the Overwing Emergency Exit ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 25-23-47-860-081-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that you did the special precautions before work on the offwing escape-slide systems (Ref. AMM TASK 25-62-00-481-001).
(3) Make sure that the slide-release system is disarmed:

Door Lining of the Overwing Emergency Exit ** ON A/C NOT FOR ALL

(a) For overwing emergency exit door 833 (844):

Make sure that the shaft (18) is pushed to the right and that the lever (19) is behind the disarm bracket (22).

(b) For overwing emergency exit door 834 (843):

Make sure that the shaft (18) is pushed to the left and that the lever (19) is behind the disarm bracket (22).

(c) Make sure that the spring (17) holds the lever (19) with the shaft (18) behind the disarm bracket (22).
(4) Make sure that the seats are removed as necessary (Ref. AMM TASK 25-21-41-000-001).
(5) On the overhead panel, on the SIGNS section of panel 25VU, make sure that EMER EXIT LT switch 4WL is in the OFF position.
(6) On Flight Attendant Panel (FAP) 120RH, make sure that the LIGHT EMER switch is in the OFF position.
(7) Make sure that the WARNING NOTICE(S) is (are) in position on panels 25VU and 120RH to tell persons not to operate switch 4WL and the LIGHT EMER switch.
(8) Clean the component interfaces and the adjacent area.
(9) Do an inspection of the component interfaces and the adjacent area.
(10) Make sure that the parts retained from the removed component are clean and in the correct condition.

Subtask 25-23-47-865-100-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
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CABIN	2WL	H04
49VU	LIGHTING/EMER LT/CABIN	1WL	H03
** ON A/C NOT FOR ALL
122VU	LIGHTING/CABIN/EMER/LT	3WL	V07

4. Procedure
Subtask 25-23-47-420-138-A ** ON A/C NOT FOR ALL

A. Installation of the Door Lining

Door Lining of the Overwing Emergency Exit ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) If removed, install the cover (9):
(a) Put the cover (9) in position and install the washers (8) and the screws (7).
(b) Tighten the screws (7).
(c) Close the related emergency exit door (Ref. AMM TASK 52-22-00-410-802).
(3) Put the panel (5) in position.
(4) Put the eccentric bushes (12) and (13) and the washers (14) in position and loosely install the screws (15).
(5) Carefully turn the eccentric bushes (12) and (13) to align the panel (5).
(6) Install the washers (11) and the screws (10).
(7) Tighten the screws (10) and (15).
(8) Install the plugs (16).
(9) Close the cover (9) and make sure that it engages correctly on the studs (6).
(10) Arm the slide-release system:
(a) For the overwing emergency exit 833 ( 844):

Push the shaft (18) to the right until the lever (19) is disengaged from the disarm bracket (22).
Turn the shaft (18) and pull it to the left.

(b) For the overwing emergency exit 834 ( 843):

Push the shaft (18) to the left until the lever (19) is disengaged from the disarm bracket (22).
Turn the shaft (18) and pull it to the right.

NOTE: The spring (17) hold the release lever (20) in position in front of the counterpart lever on the fuselage (21).

(11) Put the flap (1) in position.
(12) Make sure, that the distance "A" between the bracket (3) and the sensor is 2 mm (0.0787 in.). If necessary, adjust the bracket (3):
(a) Release the screws (4).
(b) Move the bracket (3) until the distance between the bracket (3) and the sensor is 2 mm (0.0787 in.).
(c) Tighten the screws (4).
(13) Close the flap (1) and make sure that the studs (2) engage correctly.

Subtask 25-23-47-942-052-A ** ON A/C NOT FOR ALL

B. Remove the warning notices from panels 25VU and 120RH.

Subtask 25-23-47-865-101-A ** ON A/C NOT FOR ALL

C. 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
** ON A/C NOT FOR ALL
122VU	LIGHTING/CABIN/EMER/LT	3WL	V07

5. Close-up
Subtask 25-23-47-860-083-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do the operational test of the warning system related to the emergency exit doors (Ref. AMM TASK 52-73-00-710-002).
(3) If removed, install the seats (Ref. AMM TASK 25-21-41-400-001).
(4) Do the special precautions after work on the offwing escape-slide systems (Ref. AMM TASK 25-62-00-081-001).
(5) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 03:55:23 UTC