Removal of Blockages at the Inlet Area of the Waste Holding Tank

TASK 38-31-00-100-007-A
Removal of Blockages at the Inlet Area of the Waste Holding Tank

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

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 SPIRAL-FLEXIBLE-DIA 8MM(0.31INCH)
No specific	1	CONTAINER - CLEAN, APPLICABLE
No specific	1	SHEET - PLASTIC
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03JCA9)	Silicone base Grease-Mechanisms and Seals - -
(Material No.11GCA1)	Deodorant-Aircraft Toilets - -
No specific	vinegar (10% acetic acid solution)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
162DW

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	O-RING	AIPC 38-31-04-27-070
2	O-RING	AIPC 38-31-84-32-010

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 38-31-00-100-005-A	Cleaning of the Toilet Waste Lines with Crushed Ice
TASK 38-31-00-100-005-A-01	Cleaning of Vacuum Waste Lines with Cleaners
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 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
Waste Line Cleaning - Access
Shell Clamp Installation-Requirements

3. Job Set-up
Subtask 38-31-00-861-069-A

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

Subtask 38-31-00-010-082-A

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

Waste Line Cleaning - Access

(a) Remove the screws (8) and the washers (9).
(b) Remove the plate assembly (10) from the structure (7).

Subtask 38-31-00-680-059-A

C. Drain/Flush and Disinfect the Waste System
(1) Drain and flush the waste holding tank (Ref. AMM TASK 38-31-00-680-001).
(2) Disinfect the waste system:
(a) Put 2 l (0.528 USgal) of Deodorant-Aircraft Toilets - - (Material No.11GCA1) in each toilet bowl and flush them through.

NOTE: This step is done to make sure that the complete toilet system is disinfected.

Subtask 38-31-00-860-059-A

D. Aircraft Maintenance Configuration
(1) Put the WARNING NOTICE(S) in position to tell persons not to use:

The toilet system
The waste drain system
The potable water system.

4. Procedure
Subtask 38-31-00-790-055-A

A. Do the Leak Test
(1) Do the leak test of the vacuum toilet system and make a note of the test results (Ref. AMM TASK 38-31-00-790-002).

NOTE: This test is done to compare the leak test values before and after the installation.

Subtask 38-31-00-010-083-A

B. Open the Waste Line

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

(1) Put a SHEET - PLASTIC over the outflow valve and the adjacent area to prevent contamination from sewage.
(2) Put a CONTAINER - CLEAN, APPLICABLE below the waste line (1) to collect sewage.
(3) Remove the clamp (4), the plugs (3) and (5).
(4) Remove and discard the O-ring (2).

Subtask 38-31-00-140-051-A

C. Removal of the Blockage

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

(1) Make sure that the applicable container is set below the opened waste line.

CAUTION: MAKE SURE THAT THE LENGTH OF THE ROD OR THE SPIRAL IS NOT MORE THAN THE DISTANCE BETWEEN THE ACCESS OF THE WASTE LINE AND THE WASTE-HOLDING TANK DIVERTER. THIS WILL PREVENT DAMAGE TO THE WASTE-HOLDING TANK DIVERTER.

(2) Use a CLEANING SPIRAL-FLEXIBLE-DIA 8MM(0.31INCH) or a rod to remove the blockage and the waste particles:

NOTE: Airbus recommends that you use a temporary adhesive tape along the outer contour of the waste line pipe. This is to measure the distance between the access of the waste line and the waste-holding tank diverter (6).

NOTE: Airbus recommends that you use:

A spiral to remove the blockage from the bent tubes, and

A spiral or a rod to remove the blockage from the straight tubes.

(a) Put the spiral or the rod in waste line (1) access-area view A and carefully remove:

The blockage
The waste particles and other particles from the inner sides of the waste line (1).

(b) Put the spiral in waste line (1) access-area view A and carefully remove the waste from tank-inlet-area view C.
(3) Make sure that you do not cause damage to the waste line and the waste-holding tank diverter (6) when you do this work.
(4) Remove the spiral/rod.

Subtask 38-31-00-100-054-A

D. Clean and disinfect the rod, the spiral and the container.

Subtask 38-31-00-410-080-A

E. Close the Waste Line
(1) Make sure that the items which you install are in a good condition.
(2) Lubricate the new AIPC 38-31-04-27-070 O-RING (2) or AIPC 38-31-84-32-010 O-RING (2) with grease Silicone base Grease-Mechanisms and Seals - - (Material No.03JCA9) and install it on the waste line (1).
(3) Lubricate the plug (3) with Silicone base Grease-Mechanisms and Seals - - (Material No.03JCA9) and move the plug (3) into the waste line (1).
(4) Put the plugs (3) and (5) in position and install the clamp (4).
(5) Make sure that the clamp (4) is installed correctly:

axial adjustment is more than 6.35mm
angular misalignment is +/- 4 degree in any direction around centerline.

(6) Make sure that the work area is clean and clear of tools and other items.

Subtask 38-31-00-790-056-A

F. Do the Leak Test
(1) Do the leak test of the vacuum toilet system and make a note of the result of the test (Ref. AMM TASK 38-31-00-790-002).

NOTE: Make sure that the values are correct.

Subtask 38-31-00-710-065-A

G. Do the Test of the Free Flow
(1) Put 2 l (0.528 USgal) of water (Ref. AMM TASK 38-31-00-100-005) in each toilet bowl and flush them through.

NOTE: The use of vinegar (10% acetic acid solution) and crushed ice with 2 l (0.528 USgal) make the clean result better.

(2) Flush them through and make sure that there is a free flow:

The suction of the vacuum system lets the water flow quickly through the toilet bowl.
There is a suction noise during the flush.

5. Close-up
Subtask 38-31-00-942-066-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the warning notice(s).
(3) Put the plate assembly (10) in position at the structure (7).
(4) Install the washers (9) and the screws (8).
(5) Install the access panel 162DW.
(6) Close the AFT cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(7) Remove the access platform(s).

Subtask 38-31-00-613-064-A

B. Do the Servicing of the Toilet System (Ref. AMM TASK 12-16-38-613-001).

Subtask 38-31-00-862-068-A

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

[Rev.10 from 2021] 2026.04.01 01:20:02 UTC