Operational Test of Safety Valve Position Indication

TASK 21-31-00-710-006-A
Operational Test of Safety Valve Position Indication

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

NOTE: For the test procedure two persons are required. One person must operate the safety valve, the other person must monitor the ECAM upper and lower display units and the panels 130VU and 132VU in the cockpit.

ZONE: 210
ZONE: 260

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
260	AFT CABIN UTILITY AREA

B. 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)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 21-31-00-010-050-A

A. Get access to the safety valves through the rear galley wall.

Subtask 21-31-00-865-056-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/CAB/PRESS/CTL1	1HL	D09
122VU	AIR COND/CAB PRESS/CTL/MAN	3HL	Y23
122VU	AIR COND/CAB PRESS/CTL/2	2HL	Y22

Subtask 21-31-00-860-061-A

C. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that the PRESS page is shown on the ECAM lower display unit.

4. Procedure
Subtask 21-31-00-710-056-A

A. Operational Test of the Safety Valve Position Indication

NOTE: The test procedure is the same for the safety valves 6HL and 7HL.

ACTION	RESULT
1.On one of the safety valves:	On the ECAM lower display unit:
hold the safety valve with both hands on the left and on the right side. Push the movable diaphragm with your fingers against the spring force to operate the position switch and hold it in that position for at least 1 minute.	the white SAFETY indication changes to amber and the valve symbol opens and changes to amber.
	On the panels 130VU and 132VU: the amber light in the two MASTER CAUTION pushbutton switches come on. the single audio warning is heard.
	On the ECAM upper display unit:
	the warning message CAB PR SAFETY VALVE OPEN comes on.

release the diaphragm.	On the ECAM lower display unit:
	the open valve symbol closes and changes to green and the amber SAFETY indication changes to white.
	On the panels 130VU and 132VU:
	the amber light in the two MASTER CAUTION pushbutton switches go off.
	On the ECAM upper display unit:
	the warning message CAB PR SAFETY VALVE OPEN goes off.

NOTE: Do this test again for the other safety valve.

5. Close-up
Subtask 21-31-00-860-062-A

A. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 21-31-00-410-050-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access to the safety valves.

Subtask 21-31-00-862-055-A

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

[Rev.10 from 2021] 2026.04.02 06:11:14 UTC