Operational Test of the Lavatory Lighted Signs WJ

TASK 33-26-00-710-001-A
Operational Test of the Lavatory Lighted Signs WJ

ZONE: 200

1. Reason for the Job
To make sure that the lavatory lighted signs operate correctly.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

B. 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 25-00-00-00	EQUIPMENT/FURNISHINGS - DESCRIPTION AND OPERATION

3. Job Set-up
Subtask 33-26-00-865-052-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/ANN LT SPLY/XFMR/BUS 2	27LP	X05
** ON A/C NOT FOR ALL
2000VU	LAV FWD-OCCUPIED	1WJ	F01
** ON A/C NOT FOR ALL
2000VU	LAV FWD & MID-OCCUPIED	1WJ	F01
** ON A/C ALL
2001VU	LAVATORY AFT-OCCUPIED	11WJ	B04

Subtask 33-26-00-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/ANN LT SPLY/XFMR/BUS 2	27LP	X05

4. Procedure
Subtask 33-26-00-860-050-A

A. Preparation for the Test
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that all lavatory doors are closed but not locked.

Subtask 33-26-00-710-050-A

B. Operational Test
(1) Do the test of the forward lavatory lighted signs:

ACTION	RESULT
1.In the cockpit, on INT LT panel 25VU: Set ANN LT switch 33LP to the BRT position.
2.At the lavatory A: Lift the sign LAVATORY and lock the lavatory door.	In the cockpit, on overhead panel 48VU: Annunciator OCCPD 6WJ comes on.
	In Zone 220: Green unoccupied pictorial symbol 3WJ goes off. Red occupied pictorial symbol 3WJ comes on.
3.In the cockpit, on INT LT panel 25VU: Set ANN LT switch 33LP to the DIM position.	In the cockpit, on overhead panel 48VU: Annunciator OCCPD 6WJ becomes dim.
Set ANN LT switch 33LP to the BRT position.	Annunciator OCCPD 6WJ becomes bright.
4.At the lavatory A: Lift the sign LAVATORY and unlock the lavatory door.	In the cockpit, on overhead panel 48VU: Annunciator OCCPD 6WJ goes off.
	In Zone 220: Red occupied pictorial symbol 3WJ goes off. Green unoccupied pictorial symbol 3WJ comes on.

Subtask 33-26-00-710-052-E ** ON A/C NOT FOR ALL

C. Test of the MID Lavatory Lighted Signs.
(1) Do the test of the lavatory lighted signs 23WJ and 25WJ.

ACTION	RESULT
1.At the lavatory door of the lavatory L: lift the sign LAVATORY and lock the lavatory door.	In Zone 230: the green unoccupied pictorial symbols 23WJ and 25WJ go off. the red occupied pictorial symbols 23WJ and 25WJ come on.
lift the sign LAVATORY and unlock the lavatory door.	the red occupied pictorial symbols 23WJ and 25WJ go off. the green unoccupied pictorial symbols 23WJ and 25WJ come on.

Subtask 33-26-00-710-051-A ** ON A/C NOT FOR ALL

D. Test of All Lavatory Lighted Signs.

NOTE: For lavatory location refer to (Ref. AMM D/O 25-00-00-00).

(1) Do the test of the lavatory lighted signs WJ.

ACTION	RESULT
1.At the related lavatory: with the lavatory door closed but not locked.	In the cabin: the related green information sign WJ is on.
2.At the related lavatory: lift the LAVATORY sign and lock the lavatory door.	In the cabin: the related green information sign WJ goes off. the related red information sign WJ comes on.
3.At the related lavatory: lift the LAVATORY sign and unlock the lavatory door.	In the cabin: the related red information sign WJ goes off. the related green information sign WJ comes on.

Subtask 33-26-00-710-051-D ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do the test of the aft lavatory lighted signs:

ACTION	RESULT
1.At the lavatory doors of the lavatories D and L: Lift the sign LAVATORY and lock the door of the lavatory D.	In Zone 260: Green unoccupied pictorial symbol 13WJ stays on.
Lift the sign LAVATORY and lock the door of the lavatory L.	Green unoccupied pictorial symbol 13WJ goes off. Red occupied pictorial symbol 13WJ comes on.
Lift the sign LAVATORY and unlock the door of the lavatory D.	Red occupied pictorial symbol 13WJ goes off. Green unoccupied pictorial symbol 13WJ comes on.
Lift the sign LAVATORY and unlock the door of the lavatory L.	Green unoccupied pictorial symbol 13WJ stays on.
2.At the lavatory door of the lavatory M: Lift the sign LAVATORY and lock the lavatory door.	In Zone 260: Green unoccupied pictorial symbol 14WJ goes off. Red occupied pictorial symbol 14WJ comes on.
Lift the sign LAVATORY and unlock the lavatory door.	Red occupied pictorial symbol 14WJ goes off. Green unoccupied pictorial symbol 14WJ comes on.

Subtask 33-26-00-710-051-E ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do the test of the aft lavatory lighted signs:

ACTION	RESULT
1.At the lavatory doors of the lavatories D and L: Lift the sign LAVATORY and lock the door of the lavatory D.	In Zone 260: Green unoccupied pictorial symbol 13WJ stays on.
Lift the sign LAVATORY and lock the door of the lavatory L.	Green unoccupied pictorial symbol 13WJ goes off. Red occupied pictorial symbol 13WJ comes on.
Lift the sign LAVATORY and unlock the door of the lavatory D.	Red occupied pictorial symbol 13WJ goes off. Green unoccupied pictorial symbol 13WJ comes on.
Lift the sign LAVATORY and unlock the door of the lavatory L.	Green unoccupied pictorial symbol 13WJ stays on.
2.At the lavatory door of the lavatory E: Lift the sign LAVATORY and lock the lavatory door.	In Zone 260: Green unoccupied pictorial symbol 14WJ goes off. Red occupied pictorial symbol 14WJ comes on.
Lift the sign LAVATORY and unlock the lavatory door.	Red occupied pictorial symbol 14WJ goes off. Green unoccupied pictorial symbol 14WJ comes on.

Subtask 33-26-00-710-051-G ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do the test of the aft lavatory lighted signs:

ACTION	RESULT
1.At the lavatories D and E: With the lavatory doors closed but not locked.	In Zone 260: Green unoccupied pictorial-symbols 13WJ and 14WJ are on.
2.At lavatory D: Lift the sign LAVATORY and lock the lavatory door.	In Zone 260: Green unoccupied pictorial-symbol 13WJ goes off. Red occupied pictorial-symbol 13WJ comes on.
3.At lavatory E: Lift the sign LAVATORY and lock the lavatory door.	In Zone 260: Green unoccupied pictorial-symbol 14WJ goes off. Red occupied pictorial-symbol 14WJ comes on.
4.At lavatory D: Lift the sign LAVATORY and unlock the lavatory door.	In Zone 260: Red occupied pictorial-symbol 13WJ goes off. Green unoccupied pictorial-symbol 13WJ comes on.
5.At lavatory E: Lift the sign LAVATORY and unlock the lavatory door.	In Zone 260: Red occupied pictorial-symbol 14WJ goes off. Green unoccupied pictorial-symbol 14WJ comes on.

5. Close-up
Subtask 33-26-00-862-050-A

A. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 06:07:35 UTC