Deactivation of the Waste-Water Drain Mast Heating-System

TASK 30-71-00-040-001-A
Deactivation of the Waste-Water Drain Mast Heating-System

ZONE: 200
Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	NO	NO	0.3	0.3	1

1. Reason for the Job
MMEL 30-71-01A
WASTE WATER DRAIN MAST HEATING SYSTEM
MMEL 30-71-01B
WASTE WATER DRAIN MAST HEATING SYSTEM
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	PLACARD
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
Potable Water Lavatory Shutoff Valve

3. Job Set-up
Subtask 30-71-00-861-055-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

NOTE: Airbus recommends that you open the circuit breaker(s) related to the defective drain mast only.

Subtask 30-71-00-862-050-A

DELETED

Subtask 30-71-00-865-072-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WASTE WIP-DRAINMAST-FWD	1DU	B06
** ON A/C NOT FOR ALL
2000VU	DRAINMAST-FWD	1DU	B03
** ON A/C NOT FOR ALL
2000VU	WASTE WIP-DRAINMAST-FWD	1DU	B03
** ON A/C ALL
2001VU	WASTE WIP-DRAINMAST-AFT	11DU	E01
** ON A/C NOT FOR ALL
2001VU	WASTE WIP-DRAINMAST-MID	21DU	E02

4. Procedure
Subtask 30-71-00-040-051-E

A. Deactivation Procedure
(1) Open the lavatory door.
(2) Close the manual shutoff valve of the related lavatory water supply. The shutoff valve is installed below the wash basin.
(3) Put a PLACARD on the related lavatory doors to show persons that the lavatories are not in use.
(4) Close and lock the lavatory doors.
(5) Close the shutoff valve of the related galley water supply.
(6) Put a PLACARD on the related galley water supply to tell persons not to operate the water faucet.

5. Close-up
Subtask 30-71-00-860-054-A

A. Make an entry in the logbook.

Subtask 30-71-00-862-056-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:31:39 UTC