Installation of Lavatory H

TASK 25-42-41-400-001-A
Installation of Lavatory H

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

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	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06CMD9)	Silicone Adhesive Sealant-General Purpose One part legacy
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ABC1)	Corrosion Preventive Compound_Water Displacing Soft Film -
(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. 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 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 21-23-00-720-002-A	Functional Test of an Air Extraction Point
TASK 23-73-00-710-017-A	Operational Test of the Cabin Signs
TASK 23-73-00-710-022-A	Operational Test of the Passenger Address (PA) system
TASK 23-73-00-710-024-A	Operational Test of the Passenger Call System
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 25-23-47-000-010-A	Removal of the Door Frame Linings of the Left/Right Aft Emergency Exit Doors from Zones 251/252
TASK 25-23-47-400-004-A	Installation of the Door Frame Linings of the LH FWD Emergency Exit Door, zone 231
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 38-12-00-710-002-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 38-30-00-010-002-A	Removal of the Toilet Drain Lines
TASK 38-30-00-410-002-A	Installation of the Toilet Drain Lines
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
TASK 51-75-13-916-001-A	Repair to a layer of Moisture-Removing Oil
Lavatory Module Disassembly/Assembly
Main Electrical and Hose Connections
Electrical Connections (Lavatory Disassembly)
Lower Attachment Points
Upper Attachments
Potable/Waste Water Tube Connections

3. Job Set-up
Subtask 25-42-41-860-050-M ** 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 potable water system is drained (Ref. AMM TASK 12-24-38-680-001).
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to do the servicing of the potable water system.
(4) Make sure that the lavatory door is removed (Ref. AMM TASK 25-45-19-000-001).
(5) Make sure that the ceiling panel is removed (Ref. AMM TASK 25-23-41-000-001).
(6) Make sure that the wall-mounted cabin attendant seat is removed (Ref. AMM TASK 25-22-41-000-001).
(7) Make sure that the passenger seat adjacent to the lavatory is removed (Ref. AMM TASK 25-21-41-000-001).
(8) Make sure that the door frame lining-panels are removed (Ref. AMM TASK 25-23-47-000-010).
(9) Make sure that the toilet assembly is removed (Ref. AMM TASK 38-31-41-000-001).
(10) Make sure that the toilet shroud is removed (Ref. AMM TASK 25-45-22-000-001).
(11) Make sure that the toilet drain line behind the lavatory is removed (Ref. AMM TASK 38-30-00-010-002).
(12) Make sure that the emergency oxygen container 31WR1 is removed (Ref. AMM TASK 35-21-41-000-001).

Subtask 25-42-41-865-052-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	AIR COND/SDCU/CHAN1	11WQ	C06
49VU	COM/CIDS/DEU A ESS/LINE 2	155RH	G05
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CABIN	79WL	H07
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M13
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M11
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M10
** ON A/C NOT FOR ALL
122VU	AIR COND/SDCU/CHAN2	12WQ	T18
** ON A/C NOT FOR ALL
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 WIP-HEATER-LINE	1DW	A02
2000VU	POT WIP-HEATER-CTL	2DW	A01
2000VU	LAV FWD & MID-HOT WATER-A	1MB	F02
2000VU	LAV FWD & MID-OCCUPIED	1WJ	F01
2000VU	LIGHT-LAV	1LQ	J01
2001VU	WATER SYS-QUANT-IND	1MA	B06

Subtask 25-42-41-210-050-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.
(3) Remove the sealant from the seat tracks and the attached components with the SCRAPER - NON METALLIC.
(4) Clean the seat tracks in the area of the lavatory with the Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(5) Do an inspection of the component interfaces and the adjacent area.
(6) Make sure that the parts retained from the removed component are clean and in the correct condition.
(7) Make sure that the placards of the retained/new components are in the correct position and in good condition.
(8) If necessary, install the new placards:

(9) Seal the seat track:
(a) Apply Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) to the seat tracks below the lavatory installation and at a distance of 750 mm (29.5276 in.) on each side of the lavatory installation (Ref. AMM TASK 51-75-13-916-001).
(10) Prepare the bonding (Ref. AMM TASK 20-28-00-912-802).

4. Procedure
Subtask 25-42-41-420-051-B ** ON A/C NOT FOR ALL

A. Assembly of the Lavatory Module
(1) Assembly of the Lavatory Module

Lavatory Module Disassembly/Assembly ** ON A/C NOT FOR ALL

(a) If the rubber strips (10), (12) and (13) from the floor panel (11) are removed, install them.
(b) If the screws (8) from the floor angle brackets (9) are removed, install them.
(c) Put the floor pan assembly (7) in position.
(d) Make sure that the work area is clean and clear of tools and other items.

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

(e) Apply the Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) around the floor pan (11).
(f) Put the lavatory assemblies (1) and (2) in position in the center of the aircraft aisle.
(g) Put the lavatory assemblies (1) and (2) in position and install the washers (16) and (17) and the screws (15) and (18).
(h) Install the screw (21) in the door side frame.
(i) Install the washers (19) and the screws (20) and (14) in the lavatory assembly (2).
(j) Put the lavatory assemblies (1) and (2) in position on the floor pan assembly (7).
(k) Put the washers (5) in position and install the screws (6).
(l) Put the washers (4) in position and install the screws (3).
(m) Apply a bead of sealant around the floor pan assembly (7) inside of the lavatory assemblies (1) and (2).
(2) Install the lavatory ventilation hose (if removed before).

Main Electrical and Hose Connections ** ON A/C NOT FOR ALL

(a) Make sure that the parts retained from the removed component are clean and in the correct condition.
(b) Remove the PLUG-BLANKING from each disconnected line end.
(c) Put the clamp (8) and the ventilation hose (4) in position on the ventilation tube (9).
(d) Tighten the clamp (8).
(e) Put the clamp (5) in position on the ventilation tube (4) and install the spacer (12), the washer (7) and the screw (6).
(f) Put the clamp (8) and the ventilation hose (10) in position on the ventilation tube (9).
(g) Tighten the clamp (8).
(3) Connect the electrical connections:

Electrical Connections (Lavatory Disassembly) ** ON A/C NOT FOR ALL

(a) Remove the temporary attachment from the cable assembly (9).
(b) Put the cable assembly (9) in position on the mounts (11) and install the new cable ties (10).
(c) Remove the CAP-BLANKING from each electrical connector and receptacle.
(d) Make sure that all the electrical connections are clean and in the correct condition.
(e) Connect the cable assembly (9) to the flush switch (2).
(f) Open the sanitary-cabinet access door (3).
(g) Put the bracket (5) in position and install the washers (7) and the screws (6).
(h) Connect the electrical connector (4).
(i) Attach the cable assembly (12) to the cable assembly (8) with the new cable ties (13), if necessary.
(j) Put the cable assembly (8) in position on the mounts (14) and install the new cable ties (15).
(k) Close the sanitary-cabinet access door (3).

Subtask 25-42-41-420-053-E ** ON A/C NOT FOR ALL

B. Installation of the Lower Attachments and the Lavatory Module

Lower Attachment Points ** ON A/C NOT FOR ALL

(1) When you connect/install the components, refer to the match marks made during the removal procedure.
(2) Install the lavatory module as follows:
(a) Put the seat track fittings (3) in position in the seat track.
(b) Move the seat track fittings (3) to the correct position and install the stop washers (2) with the screws (1).
(c) Tighten the screws (1).
(d) Carefully put the lavatory module in position on the seat track fittings (3).
(e) Install the bushes (5) and (6), washers (7) and bolts (8).
(f) Tighten the bolts (8) .
(g) Install the covers (4).
(3) Put the door sill (9) in position and install the screws (10).

Subtask 25-42-41-420-054-A ** ON A/C NOT FOR ALL

C. Installation of the Upper Attachments

Upper Attachments ** ON A/C NOT FOR ALL

(1) Put the tie-rod assembly (4) in position and install the quick release pins (2).
(a) If necessary adjust the tie-rod assembly (4):
1 Remove and discard the lockwire and loosen the locknuts (3).
2 Turn the tie-rod assembly (4) until you can install the quick release pins (2).
3 Tighten the locknuts (3) and safety them with stainless steel lockwire 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(b) Make sure that the rod ends are in safety.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install the access panel (1).

Subtask 25-42-41-420-056-F ** ON A/C NOT FOR ALL

D. Installation of the Lower Connections

Potable/Waste Water Tube 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:
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Put the potable water tube (2) and the potable water hose (8) in position and connect the nuts (1) to the fittings (7).
(c) TORQUE all the nuts (1) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(d) Make sure that the potable water hose (8) is not twisted.
(e) Put the bonding straps (4) in position and install the washer (6) and the nut (5) (Ref. AMM TASK 20-28-00-912-802).
(2) Connect the waste-water drain connection:
(a) When you connect/install the components, refer to the match marks made during the removal procedure.
(b) Remove the PLUG-BLANKING from each disconnected line end.
(c) Put the sleeve (15) and the clamps (16) and (14) in position on the drain tube (9).
(d) Tighten the clamps (16) and (14).
(e) Put the clamp (12) in position.
(f) Install the washer(s) (11), the bolt (10) and the nut (13).
(g) Tighten the clamp (12).
(h) Make sure that the end of the sleeve (15) is aligned with the painted mark on the drain tube (9).

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

(i) Apply Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) to the mating surface of the sleeve (15).
(3) If necessary, put the insulation (3) in its correct position.

Subtask 25-42-41-420-055-C ** ON A/C NOT FOR ALL

E. Installation of the Upper Connections

Main Electrical and Hose Connections ** ON A/C NOT FOR ALL

(1) Connect electrical connector 7208VC-A (11) as follows:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the electrical connector (11).
(2) Connect the air extraction hose (3) as follows:
(a) Remove the PLUG-BLANKING from each disconnected line end.
(b) Make sure that the line ends are clean and clear.
(c) Connect the air extraction hose (3) to the tube (1).
(d) Put the clamps (2) in position.
(e) Tighten the clamps (2).

Subtask 25-42-41-410-058-E ** ON A/C NOT FOR ALL

F. Installation of the Miscellaneous Lavatory Equipment
(1) Install the toilet drain line behind the lavatory (Ref. AMM TASK 38-30-00-410-002).
(2) Install the toilet assembly (Ref. AMM TASK 38-31-41-400-001).
(3) Do not install the toilet shroud at this time.
(4) Install emergency oxygen container 31WR1 (Ref. AMM TASK 35-21-41-400-001).
(5) Install the lavatory door (Ref. AMM TASK 25-45-19-400-001).

Subtask 25-42-41-865-054-A ** ON A/C NOT FOR ALL

G. 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	AIR COND/SDCU/CHAN1	11WQ	C06
49VU	COM/CIDS/DEU A ESS/LINE 2	155RH	G05
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CABIN	79WL	H07
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M13
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M11
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M10
** ON A/C NOT FOR ALL
122VU	AIR COND/SDCU/CHAN2	12WQ	T18
** ON A/C NOT FOR ALL
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 WIP-HEATER-LINE	1DW	A02
2000VU	POT WIP-HEATER-CTL	2DW	A01
2000VU	LAV FWD & MID-HOT WATER-A	1MB	F02
2000VU	LAV FWD & MID-OCCUPIED	1WJ	F01
2000VU	LIGHT-LAV	1LQ	J01
2001VU	WATER SYS-QUANT-IND	1MA	B06

Subtask 25-42-41-710-050-A ** ON A/C NOT FOR ALL

H. Operational Test of the Lavatory Systems
(1) Do an operational test of these water/waste systems:

The potable water system (Ref. AMM TASK 38-12-00-710-002),
The potable water heater (Ref. AMM TASK 38-12-00-710-004),
The waste/water drain system (Ref. AMM TASK 38-32-00-710-002),
The vacuum toilet unit (Ref. AMM TASK 38-31-00-710-009).

NOTE: Leaks are not permitted.

(2) Do a functional test of the lavatory air extraction system (Ref. AMM TASK 21-23-00-720-002).
(3) Do an operational test of these electrical systems:

The Passenger Address (PA) system
(Ref. AMM TASK 23-73-00-710-022).
The passenger call system
(Ref. AMM TASK 23-73-00-710-024).
The lavatory smoke detection (Ref. AMM TASK 26-17-00-710-001).
The lavatory lighting (Ref. AMM TASK 33-24-00-710-001).
The lavatory emergency lighting (Ref. AMM TASK 33-51-00-710-007).
The lavatory lighted signs (Ref. AMM TASK 33-26-00-710-001).
The return to seat sign (Ref. AMM TASK 23-73-00-710-017).
The passenger oxygen system (Ref. AMM TASK 35-23-00-710-001).

5. Close-up
Subtask 25-42-41-410-053-O ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the toilet shroud (Ref. AMM TASK 25-45-22-400-001).
(2) Install the door frame lining-panels (Ref. AMM TASK 25-23-47-400-004)
(3) Install the ceiling panel (Ref. AMM TASK 25-23-41-400-001).
(4) Install the passenger seat adjacent to the lavatory (Ref. AMM TASK 25-21-41-400-001).
(5) Install the wall-mounted cabin attendant seat (Ref. AMM TASK 25-22-41-400-001).
(6) Remove the WARNING NOTICE(S).
(7) Make sure that the work area is clean and clear of tools and other items.

Subtask 25-42-41-862-050-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] 2026.04.01 05:55:35 UTC