W DOC AIRBUS | AMM A320F

Functional Test of the Liquid Level Sensor and Transmitter

TASK 38-31-00-720-002-A
Functional Test of the Liquid Level Sensor and Transmitter

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 3M (10 FT)
No specific
1
CART - SERVICING, TOILET
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
172AR
 C. 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
3. Job Set-up
Subtask 38-31-00-861-061-A
A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 38-31-00-010-073-A
B. Get Access
   (1) Get access to the cabin.
   (2) Put an ACCESS PLATFORM 3M (10 FT) in position under the waste service panel.
   (3) Open the waste service-panel door 172AR.
Subtask 38-31-00-865-125-A
C. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-VACUUM-SYS35MGA06
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-VACUUM-GEN33MGA08
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-E34MGA04
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-D39MGA03
** ON A/C ALL
2001VUVACU TOIL SYS-LAV PWR-A32MGA01
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-VACU-SYS35MGA06
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-VACU-GEN33MGA08
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-G34MGA04
2001VUVACU TOIL SYS-LAV PWR-F39MGA03
2001VUVACU TOIL SYS-LAV PWR-D45MGA02
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-L45MGA02
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-L23MGA05
** ON A/C NOT FOR ALL
2001VUVACU TOIL SYS-LAV PWR-M34MGA04
Subtask 38-31-00-480-055-A
D. Connect a CART - SERVICING, TOILET to the flush-connection on the waste service panel.
Subtask 38-31-00-680-068-A
E. Make sure that the vacuum tank is drained (Ref. AMM TASK 38-31-00-680-001)
4. Procedure
Subtask 38-31-00-720-051-A ** ON A/C NOT FOR ALL
A. Do the Test of the liquid level Sensor 41MG and Transmitter 40MG.
ACTION
RESULT
1.At the toilet service panel:
  • fill the waste holding tank 3300MM with 85 +5 -5 l (22.45 +1.32 -1.32 USgal) of water.
On the Forward Attendant Panel (FAP) 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the waste level indicator indicates 50% on the scale.
2.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG does not operate.
  • the toilet does not flush.
    On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the toilet SYST INOP light is on.
3.On the toilet service panel:
  • push and hold the limit switch 44MG.

4.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG starts to operate.
  • approx. 0.2 l (0.05 USgal) of water flows into the toilet bowl.
  • air flows out of the ventilation port of the vacuum generator.
  • the toilet flush valve opens and the suction removes the water.
5.At the toilet service panel:
  • fill the waste holding tank 3300MM with 170 +17 -8.5 l (44.91 +4.5 -2.25 USgal) of water.
  • push and hold the limit switch 44MG.
On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the waste level indicator shows 100% on the scale.
  • the SYST INOP light is on.
6.In the lavatory:
  • push the flush switch 51MG.
In the lavatory:
  • the toilet does not flush.

On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the SYST INOP light remains on.
Subtask 38-31-00-720-051-B ** ON A/C NOT FOR ALL
A. Do the Test of the liquid level Sensor 41MG and Transmitter 40MG.
ACTION
RESULT
1.At the toilet service panel:
  • fill the waste holding tank 3300MM with 85 +5 -5 l (22.45 +1.32 -1.32 USgal) of water.
On the toilet service panel:
  • the quantity indicator shows 1/2 FULL.

On the Forward Attendant Panel (FAP) 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the waste level indicator indicates 50 % on the scale.
2.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG does not operate.
  • the toilet does not flush.
    On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the toilet SYST INOP light is on.
3.On the toilet service panel:
  • push and hold the limit switch 44MG or close the service door 172AR.

4.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG starts to operate.
  • approx. 0.2 l (0.05 USgal) of water flows into the toilet bowl.
  • air flows out of the ventilation port of the vacuum generator.
  • the toilet flush valve opens and the suction removes the water.
5.At the toilet service panel:
  • fill the waste holding tank 3300MM with 170 +17 -8.5 l (44.91 +4.49 -2.25 USgal) of water.
On the toilet service panel:
  • the quantity indicator shows FULL.

On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the waste level indicator shows 100 % on the scale.
  • the SYST INOP light is on.
6.In the lavatory:
  • push the flush switch 51MG.
In the lavatory:
  • the toilet does not flush.

On the FAP 120RH/miscellaneous panel WATER AND WASTE 124RH:
  • the SYST INOP light remains on.
Subtask 38-31-00-720-051-D ** ON A/C NOT FOR ALL
A. Do the Test of the liquid level Sensor 41MG and Transmitter 40MG.
ACTION
RESULT
1.At the toilet service panel:
  • fill the waste holding tank 3300MM with 85 +5 -5 l (22.45 +1.32 -1.32 USgal) of water.
On the Flight Attendant Panel (FAP) 120RH WATER/WASTE page:
  • the WASTE QUANTITY shows 50%.
2.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG does not operate.
  • the toilet does not flush.
    On the FAP 120RH WATER/WASTE page:
  • the VACUUM SYSTEM DISABLED-GROUND SERVICE message is shown.
3.On the toilet service panel:
  • push and hold the limit switch 44MG.

4.In the lavatory:
  • push the flush switch 51MG.
In the vacuum toilet system:
  • the vacuum generator 37MG starts to operate.
  • approx. 0.2 l (0.05 USgal) of water flows into the toilet bowl.
  • air flows out of the ventilation port of the vacuum generator.
  • the toilet flush valve opens and the suction removes the water.
    On the FAP 120RH WATER/WASTE page:
  • the VACUUM SYSTEM DISABLED-GROUND SERVICE message is not shown.
5.At the toilet service panel:
  • fill the waste holding tank 3300MM with 170 +10 -10 l (44.91 +2.64 -2.64 USgal) of water.
  • push and hold the limit switch 44MG.
On the FAP 120RH WATER/WASTE page:
  • the WASTE QUANTITY shows 100%.
  • the VACUUM SYSTEM DISABLED-WASTE TANK FULL message is shown.
6.In the lavatory:
  • push the flush switch 51MG.
In the lavatory:
  • the toilet does not flush.

On the FAP 120RH WATER/WASTE page:
  • the VACUUM SYSTEM DISABLED-WASTE TANK FULL message stays on.
5. Close-up
Subtask 38-31-00-080-055-A
A. Remove the Equipment
   (1) Do the servicing of the waste holding tank (Ref. AMM TASK 12-16-38-613-001).
   (2) Disconnect the service vehicle from the waste tank flush-connections.
Subtask 38-31-00-410-071-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access panel 172AR
   (3) Remove the access platform(s).
Subtask 38-31-00-862-061-A
C. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
Subtask 38-31-00-942-064-A
D. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.01 01:19:53 UTC
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