Installation of the Ceiling Panels

TASK 25-23-41-400-001-A
Installation of the Ceiling Panels

ZONE: 200

1. Reason for the Job

NOTE: More than one person is necessary for this task.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	Torque wrench: range to between 4.8 and 3.7 m.N (42.48 and 32.74 lbf.in )
No specific	Torque wrench: range to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE
231CC, 231DC

C. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-710-035-A	Operational Test of the Cabin LED lamps through the MCDU
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-23-42-000-001-A	Removal of the Ceiling Panels - Forward Utility Area
TASK 25-23-42-400-001-A	Installation of the Ceiling Panels - Forward Utility Area
TASK 25-24-41-000-002-A	Removal of the Door of the Overhead Stowage-Compartment
TASK 25-24-41-400-002-A	Installation of the Door of the Overhead Stowage-Compartment
TASK 25-25-11-000-001-A	Removal of the Filler Panels
TASK 25-25-11-400-001-A	Installation of the Filler Panels
TASK 33-21-00-710-001-A	Operational Test of the General Illumination
TASK 33-21-11-000-802-A	Removal of the Cabin LED Unit (CLEDU)/Mini Cabin LED Unit (mCLEDU)
TASK 33-21-11-400-802-A	Installation of the Cabin LED Unit (CLEDU)/Mini Cabin LED Unit (mCLEDU)
TASK 33-26-00-710-001-A	Operational Test of the Lavatory Lighted Signs WJ
TASK 33-51-00-710-001-A	Operational Check of Emergency Power Supply Units by BITE-Check
TASK 33-51-00-710-008-A	Operational Test of the Emergency Lighting in the Cabin with the 'EMER EXIT LT' Switch
TASK 33-51-11-000-001-A	Removal of the Cabin Emergency Lights
TASK 33-51-11-400-001-A	Installation of the Cabin Emergency Light
TASK 35-23-00-710-001-A	Operational Check of Manual Mask Release
Ceiling Panels ** ON A/C NOT FOR ALL
Ceiling Panels ** ON A/C NOT FOR ALL
Ceiling Panels ** ON A/C NOT FOR ALL
Ceiling Panels ** ON A/C NOT FOR ALL
Ceiling Panels ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 25-23-41-860-051-A ** ON A/C NOT FOR ALL

Subtask 25-23-41-860-051-B ** 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 the emergency light(s) are removed from the applicable ceiling panel(s) (Ref. AMM TASK 33-51-11-000-001).
(3) Make sure that the left and right doors of the overhead stowage-compartments (Ref. AMM TASK 25-24-41-000-002) below the related ceiling panel are removed.

Subtask 25-23-41-860-051-C ** 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 the emergency light(s) is (are) removed from the applicable ceiling panel(s) (Ref. AMM TASK 33-51-11-000-001).
(3) Make sure that the adjacent ceiling panel of the forward utility area is removed (Ref. AMM TASK 25-23-42-000-001).
(4) Make sure that the CLEDU is removed (Ref. AMM TASK 33-21-11-000-802).
(5) Make sure that the filler panels are removed (Ref. AMM TASK 25-25-11-000-001).

Subtask 25-23-41-865-054-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
** ON A/C NOT FOR ALL
2000VU	LAV FWD-OCCUPIED	1WJ	F01
** ON A/C ALL
2000VU	CAB LIGHT PWR-CEILING-AFT	307LG	H08
2000VU	CAB LIGHT PWR-CEILING-AFT	304LG	H07
2000VU	CAB LIGHT PWR-CEILING-FWD	306LG	H06
2000VU	CAB LIGHT PWR-CEILING-FWD	305LG	H05
** ON A/C NOT FOR ALL
2000VU	LAV FWD & MID-OCCUPIED	1WJ	F01
** ON A/C ALL
2001VU	LAVATORY AFT-OCCUPIED	11WJ	B04

Subtask 25-23-41-560-050-A ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the ceiling panel (4) is in good condition.
(5) Make an inspection of the air conditioning outlet ducts.
(6) Make sure that the quick release fasteners (5) and spring fasteners (3) are in good condition.
(7) Make sure that the fluorescent lights and the electrical connectors are serviceable.

Subtask 25-23-41-560-050-B ** ON A/C NOT FOR ALL

C. Preparation for Installation

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the ceiling panel (4) is in good condition.
(5) Make an inspection of the air conditioning outlet ducts.
(6) Make sure that the quick-release fasteners (5), the pins (8) and the spring fasteners (3) are in good condition.
(7) Make sure that the fluorescent lights and the electrical connectors are serviceable.

Subtask 25-23-41-560-050-C ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the ceiling panel (1) is in good condition.
(5) Make an inspection of the air conditioning outlet ducts.
(6) Make sure that the spring loaded fasteners (6) are in good condition.
(7) Make sure that the fluorescent lights and the electrical connectors are serviceable.

Subtask 25-23-41-560-050-D ** ON A/C NOT FOR ALL

C. Preparation for Installation

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Make sure that the ceiling panels (1), (3) and (4) and the lateral ceiling panels (2) are in the correct condition.
(5) Do an inspection of the air-conditioning outlet ducts if necessary.
(6) Make sure that the interlocks (8) and the latches (6) are in the correct condition.
(7) Make sure that the electrical connectors (9), (10) and (13) are serviceable.

4. Procedure
Subtask 25-23-41-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Make sure that the overhead stowage compartment doors are closed.
(2) Put the ceiling panel (4) at an angle with the left side up above the overhead stowage compartments.
(3) Move the ceiling panel (4) as far as possible to the left.
(4) Lift the right side of the ceiling panel (4) above the overhead stowage compartment.
(5) Move the ceiling panel (4) to the right and into the spring fasteners (3).
(6) Put the electrical connectors (1) through the access doors (2).
(7) Put the pins of the quick release fasteners (5) in position.
(8) Pull the ceiling panel (4) down and lock the quick release fasteners (5).
(9) Remove the blanking caps from the electrical connectors.
(10) Connect the electrical connectors (1).
(11) Make sure that all the electrical connections are clean and in the correct condition.
(12) Make sure that the work area is clean and clear of tools and other items.
(13) Close the access doors (2).
(14) Close the stowage compartment doors.

Subtask 25-23-41-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Install the ceiling panel (10):
(a) Put the ceiling panel (10) at an angle with the left side up above the overhead stowage-compartments.
(b) Move the ceiling panel (10) as far as possible to the left.
(c) Lift the right side of the ceiling panel (10) above the overhead stowage-compartment.
(d) Move the ceiling panel (10) to the right and into the spring fasteners (12).
(e) Put the electrical connectors (8) through the access doors (9).
(f) Put the pins of the quick-release fasteners (11) in position.
(g) Pull the ceiling panel (10) down and lock the quick-release fasteners (11).
(h) Remove the CAP-BLANKING from each electrical connector and receptacle.
(i) Make sure that all the electrical connections are clean and in the correct condition.
(j) Connect the electrical connectors (8).
(k) Close the access doors (9).
(2) Install the related door/s (1):
(a) Carefully put, and hold the door (1) in position.
(b) Install the pins (7) in the hinges (2).
(c) Put the damper (5) in position and install the pins (6), the washers (4) and the retaining rings (3).
(d) Close the door (1).

Subtask 25-23-41-420-050-C ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Put the ceiling panel (4) at an angle with the left side up above the overhead stowage compartments.
(2) Move the ceiling panel (4) as far as possible to the left.
(3) Lift the right side of the ceiling panel (4) above the overhead stowage compartment.
(4) Move the ceiling panel (4) to the right and into the spring fasteners (3).
(5) Put the electrical connectors (1) through the access doors (2).
(6) Put the pins of the quick release fasteners (5) in position.
(7) Pull the ceiling panel (4) down and lock the quick release fasteners (5).
(8) Remove the blanking caps from the electrical connectors.
(9) Make sure that all the electrical connections are clean and in the correct condition.
(10) Connect the electrical connectors (1).
(11) Make sure that the work area is clean and clear of tools and other items.
(12) Close the access doors (2).

Subtask 25-23-41-420-050-D ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel:

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Make sure that the drawers (5) are open.
(2) Put the ceiling panel (4) at an angle with the right side up above the overhead stowage compartments.
(3) Move the ceiling panel (4) as far as possible to the right.
(4) Lift the left side of the ceiling panel (4) above the overhead stowage compartment.
(5) Move the pins (8) into the brackets (9).
(6) Put the electrical connectors (1) through the access doors (2).
(7) Move the ceiling panel (4) to the left until you can move the pins (3) into the brackets (7).
(8) Pull the ceiling panel (4) down and push the drawers (5) into their locked position.
(9) Remove the blanking caps from the electrical connectors.
(10) Make sure that all the electrical connections are clean and in the correct condition.
(11) Connect the electrical connectors (1).
(12) Make sure that the work area is clean and clear of tools and other items.
(13) Close the access doors (2).

Subtask 25-23-41-420-050-E ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel:

Ceiling Panels ** ON A/C NOT FOR ALL

(1) Put the ceiling panel (1) at an angle with the right side up above the overhead stowage compartments.
(2) Move the ceiling panel (1) as far as possible to the right.
(3) Lift the left side of the ceiling panel (1) above the overhead stowage compartment.
(4) Move the pins (3) into the brackets (2).
(5) Push the lower ceiling panel (1) up.
(6) Make sure that the spring loaded fastener (6) are in the correct position.
(7) Put the electrical connectors (4) through the access doors (5).
(8) Remove the blanking caps from the electrical connectors.
(9) Make sure that all the electrical connections are clean and in the correct condition.
(10) Connect the electrical connectors (4).
(11) Make sure that the work area is clean and clear of tools and other items.
(12) Close the access doors (5).

Subtask 25-23-41-420-050-F ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panel

Ceiling Panels ** ON A/C NOT FOR ALL

NOTE: In the area of ceiling panel 231CC a harness is installed. Therefore there is not sufficient space for the installation of ceiling panel 231CC.

(1) Ceiling panel 231DC has to be removed before the installation of ceiling panel 231CC.
(2) Install the ceiling panel (1):
(a) For ceiling panel 231CC:
1 Make sure that ceiling panel 231DC is not installed.
2 Put ceiling panel 231CC in position at the location of ceiling panel 231DC.
(b) Put the ceiling panel (1) with an angle and the right side up above the overhead stowage compartments.
(c) Move the ceiling panel (1) as far as possible to the right.
(d) Lift the left side of the ceiling panel (1) above the overhead stowage compartment.
(e) For ceiling panel 231CC:
1 Move ceiling panel 231CC forward.
(f) Move the pins (3) into the brackets (2).
(g) Push the lower ceiling panel (1) up.
(h) Make sure that the spring loaded fasteners (6) are in the correct position.
(3) Put the electrical connectors (4) through the access doors (5).
(4) Remove the CAP-BLANKING from each electrical connector and receptacle.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Connect the electrical connectors (4).
(7) Make sure that the work area is clean and clear of tools and other items.
(8) Close the access doors (5).

Subtask 25-23-41-420-050-L ** ON A/C NOT FOR ALL

A. Installation of the Ceiling Panels

Ceiling Panels ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Make sure that you install the ceiling panels (1) and (4) before you install the ceiling panels (3).
(3) For the ceiling panels (1) and (4) and the lateral ceiling panels (2):
(a) Put the lateral ceiling panels (2) in position and engage the brackets (11).
(b) Carefully lift the lateral ceiling panels (2) and engage the studs (5) in the slide cases.
(c) Make sure that the ceiling panels are correctly engaged.
(d) Install the washers (14) and the screws (15).
(e) Torque the screws (15) to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )

.
(f) Carefully install the panel (19) and the brackets (16).
(g) Install the washers (18) and the screws (17).
(h) Torque the screws (17) to between 4.8 and 3.7 m.N (42.48 and 32.74 lbf.in )

.
(i) Remove the CAP-BLANKING from each electrical connector and receptacle.
(j) Make sure that all the electrical connections are clean and in the correct condition.
(k) Connect the electrical connectors (9) and (13).
(l) Hold the ceiling panels (1) and (4) near the monument and move it in position.
(m) Engage the brackets (7).
(n) Carefully lift the ceiling panels (1) and (4) and engage the studs (5) in the slide cases.
(o) Make sure that the ceiling panels are correctly engaged.
(p) Make sure that you engaged correctly the interlocks (8).
(4) For the ceiling panels (3):
(a) Install the ceiling panels (3) with electrical connectors first.
(b) Put the ceiling panels (3) in position and engage the panel holders (12).
(c) Carefully lift the ceiling panels (3) and engage the studs (5) in the slide.
(d) Make sure that the ceiling panels are correctly engaged.
(e) Make sure that you engaged correctly the interlocks (8).
(f) Remove the CAP-BLANKING from each electrical connector and receptacle.
(g) Make sure that all the electrical connections are clean and in the correct condition.
(h) Connect the electrical connectors (10).
(5) Make sure that the work area is clean and clear of tools and other items.

5. Close-up
Subtask 25-23-41-865-055-A

A. 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
2000VU	LAV FWD-OCCUPIED	1WJ	F01
** ON A/C ALL
2000VU	CAB LIGHT PWR-CEILING-AFT	307LG	H08
2000VU	CAB LIGHT PWR-CEILING-AFT	304LG	H07
2000VU	CAB LIGHT PWR-CEILING-FWD	306LG	H06
2000VU	CAB LIGHT PWR-CEILING-FWD	305LG	H05
** ON A/C NOT FOR ALL
2000VU	LAV FWD & MID-OCCUPIED	1WJ	F01
** ON A/C ALL
2001VU	LAVATORY AFT-OCCUPIED	11WJ	B04

Subtask 25-23-41-710-050-A ** ON A/C NOT FOR ALL

B. Do the operational test of the passenger cabin lights (Ref. AMM TASK 33-21-00-710-001) and (Ref. AMM TASK 33-51-00-710-001).

Subtask 25-23-41-710-050-C ** ON A/C NOT FOR ALL

B. Operational Tests
(1) Do the operational test of the passenger cabin lights (Ref. AMM TASK 33-21-00-710-001) and (Ref. AMM TASK 33-51-00-710-001).
(2) Do an operational check of the manual mask release on the related emergency oxygen containers (Ref. AMM TASK 35-23-00-710-001).
(3) Do the operational test of the lavatory-occupied signs (Ref. AMM TASK 33-26-00-710-001).
(4) Do the operational test of the area call panels (Ref. AMM TASK 23-73-00-710-035).
(5) Do the operational test of the emergency-exit signs (Ref. AMM TASK 33-51-00-710-008).

Subtask 25-23-41-410-052-A ** ON A/C NOT FOR ALL

C. Close Access
(1) If removed, install the emergency light(s) in the applicable ceiling panel(s) (Ref. AMM TASK 33-51-11-400-001).

Subtask 25-23-41-410-052-B ** ON A/C NOT FOR ALL

C. Close Access
(1) If removed, install the emergency light(s) in the applicable ceiling panel(s) (Ref. AMM TASK 33-51-11-400-001).
(2) Install the left and right doors of the overhead stowage-compartments (Ref. AMM TASK 25-24-41-400-002) below the related ceiling panel.

Subtask 25-23-41-410-052-C ** ON A/C NOT FOR ALL

C. Close Access
(1) Install the emergency light(s) in the applicable ceiling panel(s) (Ref. AMM TASK 33-51-11-400-001).
(2) Install the removed ceiling panel of the forward utility area (Ref. AMM TASK 25-23-42-400-001).
(3) Install the CLEDU (Ref. AMM TASK 33-21-11-400-802).
(4) Install the filler panels (Ref. AMM TASK 25-25-11-400-001).

Subtask 25-23-41-862-050-A

D. De-energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

[Rev.10 from 2021] 2026.03.31 23:31:02 UTC