Installation of Lavatory Es

TASK 25-43-42-400-802-A
Installation of Lavatory Es

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: BE CAREFUL WHEN YOU REMOVE OR INSTALL THIS EQUIPMENT. THIS EQUIPMENT IS HEAVY (MORE THAN 12 KG (26.5 lb)) AND CAN CAUSE INJURY AND/OR DAMAGE.

ZONE: 200
FIN: 5074MM ** ON A/C NOT FOR ALL

1. Reason for the Job
Self Explanatory

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

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

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SCRAPER - NON METALLIC
No specific	AR	TIE WRAP
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FBB1)	Mineral Oil base Grease-General Purpose Medium Temp. -
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	PACKINGS	AIPC 25-43-56-50-090
6	O-RING	AIPC 38-31-04-02-040
9	O-RING	AIPC 38-31-04-02-040

E. Referenced Information

REFERENCE	DESIGNATION
TASK 11-00-00-400-007-A	Installation of the ESSO (Scotchcal Labels)
TASK 12-24-38-680-001-A	Draining of the Potable Water System (with Electrical Power)
TASK 20-11-11-911-001-A	Safetying with Lockwire
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 21-21-00-710-002-A	Operational Test of the Individual Air Outlet
TASK 21-23-00-720-002-A	Functional Test of an Air Extraction Point
TASK 23-73-00-710-005-A	Operational Test of the Passenger Address (PA) system
TASK 23-73-00-710-007-A	Operational Test of the Passenger Call System
TASK 23-73-00-740-005-B	Interface and Power-Up Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
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 25-22-41-000-001-A	Removal of the Wall-Mounted Cabin-Attendant Seats
TASK 25-22-41-400-001-A	Installation of the Wall-Mounted Cabin-Attendant Seats
TASK 25-23-41-000-001-A	Removal of the Ceiling Panels
TASK 25-23-41-400-001-A	Installation of the Ceiling Panels
TASK 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-43-400-001-A	Installation of the Upper Sidewall Panel
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-44-400-001-A	Installation of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-45-000-003-A	Removal of the Door Frame Linings from the Left Aft Passenger/Crew Door
TASK 25-23-45-000-004-A	Removal of the Door Frame Linings from the Right Aft Passenger/Crew Door
TASK 25-23-45-400-005-A	Installation of the Door Frame Linings on the Right Aft Passenger/Crew Door
TASK 25-23-45-400-008-A	Installation of the Door Frame Linings on the Left Aft Passenger/Crew Door
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
TASK 25-45-19-000-001-A	Removal of the Lavatory Door
TASK 25-45-19-400-001-A	Installation of the Lavatory Door
TASK 25-45-22-000-001-A	Removal of the Toilet Shroud and the Seat
TASK 25-45-22-400-001-A	Installation of the Toilet Shroud and the Seat
TASK 26-17-00-710-001-A	Operational Test of the Lavatory Smoke-Detection System
TASK 33-24-00-710-001-A	Operational Test of the Lavatory Lighting LQ
TASK 33-26-00-710-001-A	Operational Test of the Lavatory Lighted Signs WJ
TASK 33-51-00-710-007-A	Operational Test of the Emergency Lighting in the Cabin with the 'LIGHT EMER' Pushbutton Switch
TASK 35-21-41-000-001-A	Removal of the Emergency Oxygen Containers
TASK 35-21-41-400-001-A	Installation of the Emergency Oxygen Containers
TASK 35-23-00-710-001-A	Operational Check of Manual Mask Release
TASK 38-10-00-614-002-A	Depressurization of the Potable Water System
TASK 38-12-00-710-002-A	Operational Test of the Potable Water-Distribution System (with a Ground Air-Supply Cart)
TASK 38-12-00-710-004-A	Operational Test of a Potable Water Heater
TASK 38-31-00-710-009-A	Operational Test of the Toilet Unit
TASK 38-31-41-000-001-A	Removal of a Toilet Assembly
TASK 38-31-41-400-001-A	Installation of a Toilet Assembly
TASK 38-32-00-710-002-A	Operational Test of the Waste/Water Drain System
CMM 254712
TASK 11-00-00-00	PLACARDS AND MARKINGS - DESCRIPTION AND OPERATION
TASK 25-43-00-00	AFT LAVATORIES - DESCRIPTION AND OPERATION
Lower Attachments
Upper Attachment(s)
Water Connections
Air Connections
Electrical Connections
Pelmet

3. Job Set-up
Subtask 25-43-42-860-058-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) For the location of this component, refer to Para. Component Location (Ref. AMM D/O 25-43-00-00).
(2) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
(3) Make sure that the potable water system is drained (Ref. AMM TASK 12-24-38-680-001).
(4) Make sure that the potable water system is depressurized (Ref. AMM TASK 38-10-00-614-002).
(5) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the potable water system.
(6) In the aft compartment:
(a) Make sure that the related passenger seats are removed (Ref. AMM TASK 25-21-41-000-001).
(b) Make sure that the wall-mounted cabin-attendant seat is removed (Ref. AMM TASK 25-22-41-000-001).
(c) Make sure that the panels are removed:
1 Make sure that the ceiling panel is removed (Ref. AMM TASK 25-23-41-000-001).
2 Make sure that the cove light panel is removed (Ref. AMM TASK 25-23-48-000-001).
3 Make sure that the upper sidewall panel is removed (Ref. AMM TASK 25-23-43-000-001).
4 Make sure that the lower sidewall panel is removed (Ref. AMM TASK 25-23-44-000-001).
5 Make sure that the door frame lining-panels are removed (Ref. AMM TASK 25-23-45-000-003) and (Ref. AMM TASK 25-23-45-000-004).
(7) In the lavatory:
(a) Make sure that the lavatory doors are removed (Ref. AMM TASK 25-45-19-000-001).
(b) Make sure that the toilet shroud is removed (Ref. AMM TASK 25-45-22-000-001).
(c) Make sure that the toilet assembly is removed (Ref. AMM TASK 38-31-41-000-001).
(d) Make sure that the emergency oxygen container 34WR is removed (Ref. AMM TASK 35-21-41-000-001).

Subtask 25-43-42-865-072-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	79WL	H07
121VU	COM NAV/CIDS/DEU A NORM/R AFT	168RH	M12
121VU	COM NAV/CIDS/DEU A NORM/L AFT	167RH	M11
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL	5HU	U21
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY	6HU	U19
2000VU	POT/WASTE WIP-HEATER-CTL	2DW	A01
2000VU	LIGHT-LAV	1LQ	J01
2001VU	LAVATORY AFT-OCCUPIED	11WJ	B04
2001VU	LAV AFT-HOT WATER-D	2MB	B02

Subtask 25-43-42-210-054-A ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) If necessary, remove the SAFETY BARRIER(S).
(2) Clean the component interfaces and the adjacent area.
(a) Remove the sealant from the floor panel and the attached components with the SCRAPER - NON METALLIC.
(b) If necessary, use Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Do a visual inspection of the component interface and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) If necessary, install the new placards:

(6) Prepare the bonding (Ref. AMM TASK 20-28-00-912-802).

4. Procedure
Subtask 25-43-42-420-072-A ** ON A/C NOT FOR ALL

A. Lavatory Assembly

CAUTION: WHEN YOU MOVE A HEAVY COMPONENT, DO NOT PUSH IT ALONG THE CABIN FLOOR OR LET IT RUB AGAINST THE FLOOR. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE CABIN FLOOR AND/OR THE COMPONENT.

(1) For the assembly of the lavatory refer to the manufacturer's Component Maintenance Manual CMM 254712.

Subtask 25-43-42-420-073-A ** ON A/C NOT FOR ALL

B. Installation of the Lower Attachments

Lower Attachments ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Put the bushes (2) and new AIPC 25-43-56-50-090 PACKINGS (1) in position at the attachment point locations.
(3) Put the lavatory assembly in position.
(4) Put the eccentric bushes (4) and (5) and the washers (6) and (7) in position.
(5) If necessary, turn the eccentric bushes (4) and (5) until is possible to install the bolts (8).
(6) Install the bolts (8) and tighten them.
(7) Install the covers (3).

Subtask 25-43-42-420-074-A ** ON A/C NOT FOR ALL

C. Installation of the Upper Attachment(s)

Upper Attachment(s) ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Put the tie-rod (7) in position on the aircraft structure and install the quick-release pin (6).
(3) If the tie-rod (3) is removed, install it as follows:
(a) Put the tie-rod (3) in position on the aircraft structure and install the quick-release pin (4).
(4) If necessary, adjust the tie-rods (3) and (7) as follows:

NOTE: The tie-rod is adjustable in the range of +/- 12.7 mm (0.5000 in.).

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut and discard the lockwire.
(b) Loosen the locknuts (2) and (8).
(c) Turn the tie-rods (3) and (7) clockwise or counterclockwise until you can install the quick-release pins (5) and (10) easily.
(d) Tighten the locknuts (2) and (8) and safety them with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - (Ref. AMM TASK 20-11-11-911-001).
(5) Put the tie-rods (3) and (7) in position on the lavatory structure, then install the quick-release pins (5) and (10).
(6) Make sure that the tie-rod ends (1) and (9) are safetied.

Subtask 25-43-42-420-075-A ** ON A/C NOT FOR ALL

D. Installation of the Water Connections

Water Connections ** ON A/C NOT FOR ALL

WARNING: DO NOT DO WORK ON THE TOILET WASTE SYSTEM AND THE POTABLE WATER SYSTEM AT THE SAME TIME. THIS WILL PREVENT CONTAMINATION OF THE POTABLE WATER SYSTEM. SUCH CONTAMINATION CAN BE DANGEROUS TO HEALTH.

WARNING: MAKE SURE THAT THE EQUIPMENT YOU USE FOR THIS PROCEDURE IS CLEAN AND APPROVED FOR THE POTABLE WATER SYSTEM. IF NOT IT CAN CAUSE CONTAMINATION OF THE POTABLE WATER SYSTEM.

WARNING: BEFORE YOU DO WORK ON THE POTABLE WATER SYSTEM, CLEAN YOUR HANDS WITH SOAP AND WATER. THIS WILL PREVENT INFECTION. (CONTAMINATION FROM TOILET WASTE IS DANGEROUS TO HEALTH).

(1) Connect the potable water connections as follows:
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Connect the potable water hose (16) to the tube (15) and tighten the nut (14).
(c) Make sure that the potable water hose (16) is not twisted.
(d) Put the bonding straps (1) and the washers (2) in position and install the bolts (4) and the nuts (3) and do the bonding (Ref. AMM TASK 20-28-00-912-802).
(e) Tighten the nuts (3).
(2) Connect the waste-water drain connection as follows:
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Put the clamp (12) in position on the drain tube (11).
(c) Connect the drain tube (11) to the pipe (13).
(d) Move the clamp (12) on the overlap area and tighten it.
(3) Connect the vacuum drain connection as follows:
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Put the sleeve (7) in position on the vacuum waste line (5).
(c) Apply Mineral Oil base Grease-General Purpose Medium Temp. - (Material No.03FBB1) to the new AIPC 38-31-04-02-040 O-RING (6) and AIPC 38-31-04-02-040 O-RING (9).
(d) Put the O-rings (6) and (9) in position on the vacuum waste line (5) and the vacuum waste tube (10).
(e) Put the vacuum waste tube (10) in position.
(f) Move the sleeve (7) over the O-rings (6) and (9) and install the clamp (8).
(g) Tighten the clamp (8).

Subtask 25-43-42-420-076-A ** ON A/C NOT FOR ALL

E. Installation of the Air Connections

Air Connections ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Remove the PLUG-BLANKING from each disconnected line end.
(3) Make sure that the line ends are clean and clear.
(4) Put the clamp (2) in position and connect the air-extraction hose (1) to the tube (3).
(5) Tighten the clamp (2).
(6) Put the clamp (5) in position and connect the ventilation hose (4) to the tube (6).
(7) Tighten the clamp (5).

Subtask 25-43-42-420-077-A ** ON A/C NOT FOR ALL

F. Installation of the Electrical Connections

Electrical Connections ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Release electrical connectors 7198VC-A (1) and 7196VC-A (2) from the aircraft structure.
(3) Remove the CAP-BLANKING from each electrical connector and receptacle.
(4) Make sure that all the electrical connections are clean and in the correct condition.
(5) Connect the electrical connectors (1) and (2).
(6) Put the electrical harnesses (4) in position and safety them with the new TIE WRAP (3).

Subtask 25-43-42-410-079-A ** ON A/C NOT FOR ALL

G. Installation of the Miscellaneous Lavatory Equipment
(1) In the lavatory:
(a) Install the toilet assembly (Ref. AMM TASK 38-31-41-400-001).
(b) Do not install the toilet shroud at this time.
(2) Install emergency oxygen container [34WR] (Ref. AMM TASK 35-21-41-400-001).
(3) Install the lavatory door (Ref. AMM TASK 25-45-19-400-001).

Subtask 25-43-42-865-073-A ** ON A/C NOT FOR ALL

H. 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	79WL	H07
121VU	COM NAV/CIDS/DEU A NORM/R AFT	168RH	M12
121VU	COM NAV/CIDS/DEU A NORM/L AFT	167RH	M11
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL	5HU	U21
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY	6HU	U19
2000VU	POT/WASTE WIP-HEATER-CTL	2DW	A01
2000VU	LIGHT-LAV	1LQ	J01
2001VU	LAVATORY AFT-OCCUPIED	11WJ	B04
2001VU	LAV AFT-HOT WATER-D	2MB	B02

Subtask 25-43-42-710-057-A ** ON A/C NOT FOR ALL

I. Operational Test of the Lavatory Systems
(1) Do the test of these potable water/waste-water systems:

Potable water system (Ref. AMM TASK 38-12-00-710-002)
Waste-water drain system (Ref. AMM TASK 38-32-00-710-002)
Vacuum toilet system (Ref. AMM TASK 38-31-00-710-009).

Make sure that there are no leaks.
(2) Do the functional test of the applicable air-extraction point (Ref. AMM TASK 21-23-00-720-002).
(3) Do the operational test of the individual-air outlet system (Ref. AMM TASK 21-21-00-710-002).
(4) Do the operational test of these electrical systems/units:

CIDS (Ref. AMM TASK 23-73-00-740-005)
Lavatory lighting (Ref. AMM TASK 33-24-00-710-001)
Lavatory emergency lighting (Ref. AMM TASK 33-51-00-710-007)
Lavatory lighted signs (Ref. AMM TASK 33-26-00-710-001)
Potable water heater (Ref. AMM TASK 38-12-00-710-004)
Lavatory smoke-detection system (Ref. AMM TASK 26-17-00-710-001)
Passenger Address (PA) system (Ref. AMM TASK 23-73-00-710-005)
Passenger call system (Ref. AMM TASK 23-73-00-710-007)
Manual mask release (Ref. AMM TASK 35-23-00-710-001).

(5) Make sure that the lavatory auxiliary light is on.

Subtask 25-43-42-420-078-A ** ON A/C NOT FOR ALL

J. Installation of the Pelmet

Pelmet ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Put the pelmet (5) in position and install the screws (4).
(3) Put the bonding strap (3) and the washer (2) in position and install the bolt (1). Do the bonding (Ref. AMM TASK 20-28-00-912-802).

5. Close-up
Subtask 25-43-42-410-076-A ** ON A/C NOT FOR ALL

A. Close Access
(1) In the lavatory:
(a) Install the toilet shroud (Ref. AMM TASK 25-45-22-400-001).
(2) In the aft compartment:
(a) Install the related passenger seats (Ref. AMM TASK 25-21-41-400-001).
(b) Install the panels:
1 Install the ceiling panel (Ref. AMM TASK 25-23-41-400-001).
2 Install the cove light panel (Ref. AMM TASK 25-23-48-400-001).
3 Install the upper sidewall panel (Ref. AMM TASK 25-23-43-400-001).
4 Install the lower sidewall panel (Ref. AMM TASK 25-23-44-400-001).
5 Install the door-frame lining panels (Ref. AMM TASK 25-23-45-400-008) and (Ref. AMM TASK 25-23-45-400-005).
(c) Install the wall-mounted cabin-attendant seat (Ref. AMM TASK 25-22-41-400-001).
(d) Close all doors.
(e) Make sure that the work area is clean and clear of tools and other items.
(f) Remove the warning notice(s).

Subtask 25-43-42-862-053-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:35:25 UTC