Replacement of the Fluorescent Tube in the Ceiling Panel

TASK 33-21-11-960-001-A
Replacement of the Fluorescent Tube in the Ceiling Panel

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	GLOVES - COTTON, LINT-FREE, CLEAN
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	STEPLADDER 1.0 M (3.3 FT)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
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 25-23-42-000-001-A	Removal of the Ceiling Panels - Forward Utility Area
TASK 25-23-42-000-002-A	Removal of the Ceiling Panels - Aft Utility Area
TASK 25-23-42-400-001-A	Installation of the Ceiling Panels - Forward Utility Area
TASK 25-23-42-400-002-A	Installation of the Ceiling Panels - Aft Utility Area
TASK 25-23-48-000-001-A	Removal of the Cove Light Panel
TASK 25-23-48-400-001-A	Installation of the Cove Light Panel
Replacement of the Fluorescent Tube in the Ceiling Panel

3. Job Set-up
Subtask 33-21-11-861-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

NOTE: The table that follows shows you all circuit breakers for the ballast units. If you open all the circuit breakers, the cabin becomes dark.

Subtask 33-21-11-865-058-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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
2000VU	CAB LIGHT PWR-WINDOW-AFT	302LG	H04
2000VU	CAB LIGHT PWR-WINDOW-AFT	301LG	H03
2000VU	CAB LIGHT PWR-WINDOW-FWD	303LG	H02
2000VU	CAB LIGHT PWR-WINDOW-FWD	300LG	H01

Subtask 33-21-11-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) For the aisle light unit:

Replacement of the Fluorescent Tube in the Ceiling Panel ** ON A/C NOT FOR ALL

(a) Put the STEPLADDER 1.0 M (3.3 FT) below the related ceiling panel.
(b) Release the quick-release fasteners (4) and remove the light cover (5).
(2) For the window light unit:
(a) Remove the related cove light panel (Ref. AMM TASK 25-23-48-000-001).
(3) For the entrance light unit:
(a) Put the STEPLADDER 1.0 M (3.3 FT) below the related ceiling panel.
(b) Remove the related ceiling panel (Ref. AMM TASK 25-23-42-000-001) (Ref. AMM TASK 25-23-42-000-002).

4. Procedure
Subtask 33-21-11-960-050-A ** ON A/C NOT FOR ALL

A. Replacement of the Fluorescent Tube

NOTE: The procedure is the same for all fluorescent tubes in the aisle light strips, window light strips and entrance lights (if installed).

(1) Use GLOVES - COTTON, LINT-FREE, CLEAN for the replacement of the fluorescent tube (1).

CAUTION: DO NOT TOUCH THE LAMP GLASS WITH YOUR FINGERS. THE OILS FROM YOUR SKIN WILL QUICKLY CAUSE DETERIORATION OF THE LAMP. IF YOU ACCIDENTALLY TOUCH THE LAMP GLASS, CLEAN IT WITH A LINT-FREE CLOTH.

(2) Hold the fluorescent tube (1) and push the button (2) at the end of the lampholder (3) to remove the fluorescent tube (1).
(3) Remove and discard the fluorescent tube (1).
(4) Install the new fluorescent tube (1) into the lampholder (3). Make sure that you hear a click from each holder when you push the fluorescent tube (1) into the lampholder (3).

Subtask 33-21-11-865-059-A ** ON A/C NOT FOR ALL

B. 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
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
2000VU	CAB LIGHT PWR-WINDOW-AFT	302LG	H04
2000VU	CAB LIGHT PWR-WINDOW-AFT	301LG	H03
2000VU	CAB LIGHT PWR-WINDOW-FWD	303LG	H02
2000VU	CAB LIGHT PWR-WINDOW-FWD	300LG	H01

Subtask 33-21-11-860-053-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the Cabin Intercommunication Data System (CIDS) is energized
(Ref. AMM TASK 23-73-00-861-001).

Subtask 33-21-11-710-052-A ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do this test of the entrance-Lights, window-lights and ceiling-lights:

ACTION	RESULT
1.For the entrance lighting:
On Flight Attendant Panel (FAP) 120RH:	On FAP 120RH:
Set the 'LIGHT' page.	All possible cabin lighting zones are shown.
Push the ENTRY/BRT button.	The ENTRY/BRT indication on the related button comes on.
	In the cabin: The related entrance light comes on.
	On FAP 120RH:
Push the ENTRY/DIM1 button.	The ENTRY/DIM1 indication on the related button comes on.
	In the cabin: The related entrance light intensity decreases.
	On FAP 120RH:
Push the ENTRY/DIM2 button.	The ENTRY/DIM2 indication on the related button comes on.
	In the cabin: The related entrance light intensity decreases again.
	On FAP 120RH:
Push the ENTRY/DIM2 button again.	The ENTRY/DIM2 indication on the related button goes off.
	In the cabin: The related entrance light goes off.
2.For the window or ceiling lighting:
On FAP 120RH:	On FAP 120RH:
Push the BRT button.	The BRT indication on the related button comes on.
	In the cabin: The related window or ceiling light comes on.
	On FAP 120RH:
Push the DIM1 button.	The DIM1 indication on the related button comes on.
	In the cabin: The related window or ceiling light intensity decreases.
	On FAP 120RH:
Push the DIM2 button.	The DIM2 indication on the related button comes on.
	In the cabin: The related window or ceiling light intensity decreases again.
	On FAP 120RH:
Push the DIM2 button again.	The DIM2 indication on the related button goes off.
	In the cabin: The related window or ceiling light goes off.

5. Close-up
Subtask 33-21-11-410-053-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 the related panel:
(a) For the aisle light unit:

Replacement of the Fluorescent Tube in the Ceiling Panel ** ON A/C NOT FOR ALL

1 Put the STEPLADDER 1.0 M (3.3 FT) under related ceiling panel.
2 Install the light cover (5) with the quick-release fasteners (4).
(b) For the window light unit:
1 Install the related cove light panel (Ref. AMM TASK 25-23-48-400-001).
(c) For the entrance light unit:
1 Put the STEPLADDER 1.0 M (3.3 FT) below the related ceiling panel.
2 Install the related ceiling panel (Ref. AMM TASK 25-23-42-400-001) (Ref. AMM TASK 25-23-42-400-002).
(3) Remove the STEPLADDER 1.0 M (3.3 FT).

Subtask 33-21-11-862-052-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:53:18 UTC