Cleaning of the Waste Holding Tank

TASK 38-31-00-100-003-A
Cleaning of the Waste Holding Tank

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

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

FIN: 3300MM

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	ACCESS PLATFORM 2M (6 FT)
No specific	AR	CLEANING EQUIPMENT VACLAV - TANK, INTERN
No specific	1	CONTAINER 3 L(3/4 USGAL)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	Torque wrench: range to between 0.11 and 0.09 m.daN (9.73 and 7.96 lbf.in )
No specific	Torque wrench: range to between 0.165 and 0.135 m.daN (14.60 and 11.95 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.05BAE1)	Threadlocking Adhesive-- Medium strength -
(Material No.11GCA1)	Deodorant-Aircraft Toilets - -
No specific	metal adapter
No specific	tank cover adapter-VACLAV Cleaner

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
162DW

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	PACKING	AIPC 38-31-04-34-050
9	PACKING	AIPC 38-31-04-34-050
4	O-RING	AIPC 38-31-61-15-020
5	O-RING	AIPC 38-31-61-15-020

E. 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 38-31-00-680-001-A	Draining of the Toilet System
TASK 38-31-00-790-002-A	Leak Test of the Vacuum Toilet System (VTS)
TASK 38-31-62-000-001-A	Removal of the Liquid Level Transmitter
TASK 38-31-62-400-001-A	Installation of the Liquid Level Transmitter
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-004-A	Close the FWD or Aft Cargo-Compartment Door with the Hand Pump
Cover ** ON A/C NOT FOR ALL
Schematic
Cover ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 38-31-00-861-066-A

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

Subtask 38-31-00-010-060-A

B. Get Access
(1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(2) Put an ACCESS PLATFORM 2M (6 FT) in position at Zone 172.
(3) Remove access panel 162DW.

Subtask 38-31-00-680-055-A

C. Draining of the Toilet System
(1) Drain the toilet system, but do not remove the service vehicle (Ref. AMM TASK 38-31-00-680-001).

Subtask 38-31-00-865-075-A

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

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 38-31-00-480-056-A

E. Installation of the Cleaning Equipment
(1) Put the CLEANING EQUIPMENT VACLAV - TANK, INTERN in position adjacent the aft cargo compartment door.
(a) Prepare a CONTAINER 3 L(3/4 USGAL) with 2.0 l (0.53 USgal) of Deodorant-Aircraft Toilets - - (Material No.11GCA1) .
(b) Put the disinfectant intake hose of the VACLAV cleaner unit into the container.

4. Procedure
Subtask 38-31-00-860-055-A ** ON A/C NOT FOR ALL

A. Preparation for Cleaning

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

(1) Remove the screws (2).
(2) Remove the cover (3) and discard the O-ring (4).
(3) Remove the liquid level transmitter (Ref. AMM TASK 38-31-62-000-001).
(4) Examine the liquid level transmitter for contamination.
(5) If the liquid level transmitter is contaminated, clean it in the shop.
(6) Put the AIPC 38-31-04-34-050 PACKING (8) and the metal adapter (7) in position and install the washers (6) and the nuts (5) (as an alternative to the liquid level transmitter).
(7) Install the tank cover adapter-VACLAV Cleaner on the waste holding tank.
(8) Install the CLEANING EQUIPMENT VACLAV - TANK, INTERN on the waste holding tank.
(9) Connect the water supply hose of the VACLAV cleaner unit to the internal tank cleaner.
(10) Connect the electrical connector 24VAC to the internal tank cleaner.
(11) Connect the hose of a water supply source to the VACLAV cleaner unit.
(12) Connect the VACLAV cleaner unit to an electrical source 380VAC 50Hz/440VAC 60Hz.

Subtask 38-31-00-100-052-A ** ON A/C NOT FOR ALL

B. Cleaning of the Waste Holding Tank

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

(1) Operate the VACLAV cleaner unit.
(2) Open the water-supply shutoff valve.
(3) Adjust the water pressure so that the pressure at the nozzle is at a maximum of 10 bar (145 psi).
(4) If the modified internal cleaner with the twin nozzles is used, adjust the water pressure to between 40 and 50 bar (580 and 725 psi).

NOTE: You can set the water pressure of the VACLAV cleaner unit to 200 bar (2900.8 psi). However you must make sure that the final pressure at the nozzle is not more than 10 bar (145 psi).

(5) Let the VACLAV cleaner unit operate for approximately 15 min.
(6) Open the disinfectant valve of the VACLAV cleaner unit for approximately 1 min.
(7) Close the disinfectant valve.
(8) Reduce the pressure of the water supply at the VACLAV cleaner unit.
(9) Close the water-supply shutoff valve.
(10) Disconnect the electrical connector 24VAC at the internal tank cleaner.
(11) Disconnect the water supply hose at the internal tank cleaner.
(12) Remove the internal tank cleaner.
(13) Remove the tank cover adapter.
(14) Removal of the metal adapter (7).
(a) Remove the nuts (5) and the washers (6).
(b) Remove the metal adapter and the packing (8).
(15) Disconnect the water supply hose at the VACLAV cleaner unit.
(16) Disconnect the waste drain hose.

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

(a) If necessary use pressurized air to dry the inside of the waste holding tank.

Subtask 38-31-00-410-062-A ** ON A/C NOT FOR ALL

C. Installation of the Cover
(1) Make sure that the screw inserts in the waste holding tank (1) are in a good condition.
(2) Apply Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the new AIPC 38-31-61-15-020 O-RING (4).
(3) Put the cover (3) and the O-ring (4) in their installation positions and install the screws (2).
(4) TORQUE the screws (2) to between 0.165 and 0.135 m.daN (14.60 and 11.95 lbf.in )

.
(5) Lock the screws (2) with Threadlocking Adhesive-- Medium strength - (Material No.05BAE1) .
(6) Install the liquid level transmitter (Ref. AMM TASK 38-31-62-400-001).

Subtask 38-31-00-860-055-C ** ON A/C NOT FOR ALL

D. Preparation for Cleaning

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

(1) Remove the screws (3) and the washers (2).
(2) Remove the cover (4) and discard the O-ring (5).
(3) Remove the liquid level transmitter (Ref. AMM TASK 38-31-62-000-001).
(4) Put the AIPC 38-31-04-34-050 PACKING (9) and the metal adapter (8) in position and install the washers (7) and the nuts (6) (as the alternative for the liquid level transmitter).
(5) Install the tank cover adapter-VACLAV Cleaner to the waste holding tank.
(6) Install the CLEANING EQUIPMENT VACLAV - TANK, INTERN in the waste holding tank.
(7) Connect the water supply hose of the VACLAV cleaner unit to the internal tank cleaner.
(8) Connect the electrical connector 24VAC to the internal tank cleaner.
(9) Connect the hose of a water supply source to the VACLAV cleaner unit.
(10) Connect the VACLAV cleaner unit to an electrical source 380VAC 50Hz/440VAC 60Hz.

Subtask 38-31-00-100-052-C ** ON A/C NOT FOR ALL

E. Cleaning of the waste holding tank.

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

NOTE: You can set the water pressure of the VACLAV cleaner unit to 200 bar (2900.8 psi). However you must make sure that the final pressure at the nozzle is not more than 10 bar (145 psi).

(5) Let the VACLAV cleaner unit operate for approximately 15 min.
(6) Open the disinfectant valve of the VACLAV cleaner unit for approximately 1 min.
(7) Close the disinfectant valve.
(8) Reduce the pressure of the water supply at the VACLAV cleaner unit.
(9) Close the water-supply shutoff valve.
(10) Disconnect the electrical connector 24VAC at the internal tank cleaner.
(11) Disconnect the water supply hose at the internal tank cleaner.
(12) Remove the internal tank cleaner.
(13) Remove the tank cover adapter.
(14) Removal of the metal adapter (8).
(a) Remove the nuts (6) and the washers (7).
(b) Remove the metal adapter (8) and the packing (9).
(15) Disconnect the water supply hose at the VACLAV cleaner unit.
(16) Disconnect the waste drain hose.

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

(a) If necessary use pressurized air to dry the inside of the waste holding tank.

Subtask 38-31-00-410-062-C ** ON A/C NOT FOR ALL

F. Installation of the Cover (4)
(1) Make sure that the screw inserts in the waste holding tank (1) are in a good condition.
(2) Apply Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the new AIPC 38-31-61-15-020 O-RING (5).
(3) Put the cover (4) and the O-ring (5) in position and install the washers (2) and the screws (3).
(4) TORQUE the screws (3) to between 0.11 and 0.09 m.daN (9.73 and 7.96 lbf.in )

.
(5) Lock the screws (3) with Threadlocking Adhesive-- Medium strength - (Material No.05BAE1) .
(6) Install the liquid level transmitter (Ref. AMM TASK 38-31-62-400-001).

Subtask 38-31-00-865-091-A

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
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 38-31-00-790-061-A

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

NOTE: Leaks are not permitted.

5. Close-up
Subtask 38-31-00-410-063-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install access panel 162DW.
(3) Close the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-002) or (Ref. AMM TASK 52-30-00-860-004).

Subtask 38-31-00-613-057-A

B. Servicing of the Toilet System
(1) Service the toilet system (Ref. AMM TASK 12-16-38-613-001).

Subtask 38-31-00-862-065-A

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

Subtask 38-31-00-942-058-A

D. Removal of the Ground Support Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(2) Remove the VACLAV cleaner unit.
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:19:54 UTC