Cleaning of the Toilet Waste Lines with High Pressure Equipment VACLAV 1

TASK 38-31-00-100-004-A
Cleaning of the Toilet Waste Lines with High Pressure Equipment VACLAV 1

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

NOTE: Tasks 38-31-00-100-015, 38-31-00-100-019, 38-31-00-100-803 and 38-31-00-100-804 are alternative and interchangeable cleaning procedures to task 38-31-00-100-004.

ZONE: 200

1. Reason for the Job
Refer to the MPD TASK: 383100-07
CORRECTIVE VACUUM WASTE LINE CLEANING.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	BRUSH - BRISTLED
No specific	1	CLEANING EQUIPMENT VACLAV - TANK, INTERN
No specific	1	COVER - PLASTIC

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03JBA1)	Silicone base Grease-General Purpose - -
(Material No.11AKB1)	Disinfectant-Potable Water System Hypochlorite -
(Material No.11CBA1)	Disinfectant and cleaner-Aircraft general - -
(Material No.11GCA1)	Deodorant-Aircraft Toilets - -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	clean water
No specific	water

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-16-38-613-001-A	Servicing of the Toilet 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 25-45-22-000-001-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 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 38-31-00-680-001-A	Draining of the Toilet System
TASK 38-31-00-710-009-A	Operational Test of the Toilet Unit
TASK 38-31-00-790-002-A	Leak Test of the Vacuum Toilet System (VTS)
TASK 38-31-41-000-001-A	Removal of a Toilet Assembly
TASK 38-31-41-400-001-A	Installation of a Toilet Assembly
Shell Clamp Installation-Requirements

3. Job Set-up
Subtask 38-31-00-861-062-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 38-31-00-865-093-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-VACUUM-SYS	35MG	A06
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-VACUUM-GEN	33MG	A08
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-E	34MG	A04
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-D	39MG	A03
** ON A/C ALL
2001VU	VACU TOIL SYS-LAV PWR-A	32MG	A01
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-VACU-SYS	35MG	A06
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-VACU-GEN	33MG	A08
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-G	34MG	A04
2001VU	VACU TOIL SYS-LAV PWR-F	39MG	A03
2001VU	VACU TOIL SYS-LAV PWR-D	45MG	A02
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-L	45MG	A02
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-L	23MG	A05
** ON A/C NOT FOR ALL
2001VU	VACU TOIL SYS-LAV PWR-M	34MG	A04

Subtask 38-31-00-680-056-A

C. Drain and flush the waste holding tank (Ref. AMM TASK 38-31-00-680-001).

Subtask 38-31-00-941-076-A

D. Safety Precautions

(1) Do the leak test of the vacuum toilet system (Ref. AMM TASK 38-31-00-790-002).

NOTE: It is recommended that you compare the results of the leak test recorded before the removal and after the installation of the component of the vacuum toilet system.

Subtask 38-31-00-010-075-A

E. Get Access
(1) Get access to the lavatory.
(2) It is necessary to start in the most forward lavatory.
(3) Remove the toilet shrouds as necessary (Ref. AMM TASK 25-45-22-000-001).
(4) Close the water shutoff valves in the lavatories.
(5) Put warning notices in position at the toilets to tell persons not to use them.

4. Procedure
Subtask 38-31-00-860-052-A

A. Prepare the Waste System
(1) Prepare the toilet assemblies:

WARNING: ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.

(a) Put 4 l (1 USgal) of Deodorant-Aircraft Toilets - - (Material No.11GCA1) in each toilet assembly.
(b) Flush the toilet assemblies.
(c) Apply Disinfectant and cleaner-Aircraft general - - (Material No.11CBA1) to the toilet bowl, the flush valves and other dirty areas.

NOTE: If the toilet waste line is blocked, it is recommended that you remove the line and clean it before you do this procedure.

(2) Drain the waste holding tank (Ref. AMM TASK 38-31-00-680-001).
(3) Put the COVER - PLASTIC on the floor of the lavatory and the adjacent area to give protection to the floor coverings.
(4) Remove the short waste line(s) from the related waste-tank inlet port (Ref. AMM TASK 38-30-00-010-002).
(5) Clean the short waste line(s) as follows:
(a) Prepare a solution of Disinfectant-Potable Water System Hypochlorite - (Material No.11AKB1) and water as given in the table.

Disinfectant	Water	Strength of solution
Sodium Hypochlorite 500 ml	5 l	10%

(b) Put the short waste line(s) in an applicable container with the solution and let it/them stay for 4 hours.
(c) After 4 hours, remove the short waste line(s) from the container.
(d) If necessary, clean the short waste line(s) with a BRUSH - BRISTLED.
(e) Flush the short waste line(s) with clean water.

Subtask 38-31-00-100-050-A

B. Cleaning of the Toilet Waste Lines

WARNING: ALWAYS WEAR RUBBER GLOVES, GOGGLES AND PROTECTIVE CLOTHES WHEN YOU DO THIS TASK.

(1) Do the procedure in all the lavatories, one after the other.
(2) Install the removed short waste line(s) on the related waste-tank inlet port (Ref. AMM TASK 38-30-00-410-002).
(3) Disconnect only one toilet at a time.
(4) Start the procedure in the forward lavatory.
(5) Disconnect the toilet assembly from the aircraft system as follows (Ref. AMM TASK 38-31-41-000-001):

NOTE: It is not necessary to disconnect the electrical connectors for this procedure.

(a) Remove the shell clamp and disconnect the toilet assembly from the elbow of the main vacuum line.

NOTE: It is not necessary to remove the toilet assembly.

(6) Assemble the CLEANING EQUIPMENT VACLAV - TANK, INTERN.

NOTE: The high-pressure cleaning equipment has these parts:

(a) A high-pressure water pump-VACLAV cleaner
(b) A high-pressure hose (10 MM (0.39 IN.) dia., 40 m (131 ft.) long-VACLAV cleaner)
(c) A spray nozzle-VACLAV cleaner with the parts that follow:

6 nozzles in the rear direction (0.8 MM (0.03 IN.) dia.) at an angle of 40 deg (40 deg)
1 nozzle in the front direction (0.8 MM (0.03 IN.) dia).

CAUTION: MAKE SURE THAT THE HOSE DOES NOT GO INTO THE WATER SEPARATOR. IF THE HOSE GOES INTO THE WATER SEPARATOR, DAMAGE TO THE WATER SEPARATOR AND THE WASTE HOLDING TANK CAN OCCUR.

(7) Clean the toilet waste lines as follows:
(a) Put the spray nozzle approximately 1 m (3.28 ft.) into the aircraft waste line.

NOTE: Warm water with a maximum temperature of 60 DEG.C (140 DEG.F) will make the cleaning procedure easier.

(b) Operate the high-pressure water pump at a maximum pressure of 100 bar (1450 psi).
(c) Slowly push the high-pressure hose into the waste line, and if necessary, apply Silicone base Grease-General Purpose - - (Material No.03JBA1) to the high-pressure hose.
(d) Flush the toilet at intervals of 30 seconds to drain the waste line.
(e) Stop the high-pressure cleaning equipment at intervals of 8 minutes to drain the waste holding tanks (Ref. AMM TASK 38-31-00-680-001).
(f) When you cannot push the spray nozzle more into the waste line, do the steps that follow:
1 Stop the high-pressure water pump.
2 Remove the high-pressure hose from the waste line.
(g) If necessary, do the procedure again.

Subtask 38-31-00-410-072-A

C. Connection of the Toilet Assemblies
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Clean and dry the work area with a Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Connect the toilet assemblies (Ref. AMM TASK 38-31-41-400-001):
(a) Install the new packing on the toilet assembly.
(b) Move the sleeve onto the packing.
(c) Install the new packing on the elbow of the main vacuum line.
(d) Install the shell clamp to connect the toilet assembly with the elbow of the main vacuum line.
(e) Make sure that the shell clamp is installed correctly:

Shell Clamp Installation-Requirements

The axial adjustment is not more than 6.35 MM (0.25 IN.).
The angular misalignment is +/- 4 degrees in all directions around the centerline.

(4) Remove the plastic cover from the work area.

Subtask 38-31-00-790-062-A

D. Do the Leak Test of the vacuum System (Ref. AMM TASK 38-31-00-790-002)
(1) If the leak test is not satisfactory, trouble shoot the system to find the leak. To get access to the waste drain lines (Ref. AMM TASK 38-30-00-010-002) and (Ref. AMM TASK 38-30-00-410-002).

Subtask 38-31-00-710-066-A

E. Do this Test
(1) Open the water shutoff valve in the lavatories.
(2) Do an operational test of the toilet assemblies (Ref. AMM TASK 38-31-00-710-009).

Subtask 38-31-00-613-061-A

F. Do the servicing of the waste system (Ref. AMM TASK 12-16-38-613-001).

5. Close-up
Subtask 38-31-00-410-073-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the toilet shroud (Ref. AMM TASK 25-45-22-400-001).
(3) Remove the warning notices.

Subtask 38-31-00-862-062-A

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

[Rev.10 from 2021] 2026.04.01 01:19:56 UTC