Verification Test (Safety Valves and Outflow Valve)

TASK 21-31-00-040-001-A
Verification Test (Safety Valves and Outflow Valve)

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 131VU in the cockpit.

FIN: 10HL
FIN: 6HL
FIN: 7HL
Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	NO	NO	1.0	1.0	2

1. Reason for the Job
MMEL 21-31-03A
PRESSURE SAFETY VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

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 31-32-00-860-002-A	Procedure to Get Access to the SYSTEM REPORT/TEST/AIR COND Page
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure
Safety Valves - Verification Test

3. Job Set-up
Subtask 21-31-00-861-059-A

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

Subtask 21-31-00-865-059-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 21-31-00-865-074-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	RPCU	4HL	X23

Subtask 21-31-00-010-056-A

D. Get Access
(1) Remove the food trolleys (1) and the trolley partition if installed.
(2) Remove the panel (3).

Subtask 21-31-00-860-051-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(2) On the ECAM control panel push the PRESS pushbutton switch, the CAB PRESS page comes into view on the lower ECAM display unit.
(3) On one MCDU get the SYSTEM REPORT/TEST AIR COND menu page (Ref. AMM TASK 31-32-00-860-002).
(4) On the AIR COND panel 30VU, make sure that:

the PACK 1 and the PACK 2 pushbutton switches are in the OFF position (the OFF legends are on).
the RAM AIR pushbutton switch is in the OFF position (the ON legend is off).

(5) On the CABIN PRESS panel 25VU, make sure that:

the MODE SEL pushbutton switch is in the AUTO configuration (with the FAULT and MAN legends off).
the LDG ELEV selector is in the AUTO position.
the DITCHING pushbutton switch is in the AUTO configuration (with the ON legend off).

(6) Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
(7) On the ADIRS CDU panel 20VU:

make sure that the 3 OFF/NAV/ATT switches are in the NAV position and that the ADR 1, ADR 2 and ADR 3 pushbutton switches are in the on position (with the FAULT and OFF legends off).

Subtask 21-31-00-860-051-B ** ON A/C NOT FOR ALL

the PACK 1 and the PACK 2 pushbutton switches are in the OFF position (the OFF legends are on).
the RAM AIR pushbutton switch is in the OFF position (the ON legend is off).

(5) On the CABIN PRESS panel 25VU, make sure that:

the MODE SEL pushbutton switch is in the AUTO configuration (with the FAULT and MAN legends off).
the LDG ELEV selector is in the AUTO position.
the DITCHING pushbutton switch is in the AUTO configuration (with the ON legend off).

(6) Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
(7) On the ADIRS MSU panel 41VU:

make sure that the 3 OFF/NAV/ATT switches are in the NAV position and that the ADR 1, ADR 2 and ADR 3 pushbutton switches are in the on position (with the FAULT and OFF legends off).

4. Procedure
Subtask 21-31-00-710-064-A

A. Verification Test Part 1.

Safety Valves - Verification Test

(1) Operational Test of the Safety Valve Position Indicator

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

ACTION	RESULT
1.On one of the safety valves (2):	On the ECAM lower display unit:
apply hand pressure at points A and push the valve diaphragm until the spring is compressed and hold it for 1 minute.	the white SAFETY indication changes to amber and the valve symbol opens and changes to amber.
	On the panels 130VU and 131VU: 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 131VU:
	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.

NOTE: Make sure that one safety valve is operative.
The inoperative safety valve must be in the closed position. (The ring gate must seat properly on the rubber seal.)

Subtask 21-31-00-710-062-B

B. Verification Test Part 2.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE OUTFLOW VALVES ARE CLEAR. MOVEMENT OF THE OUTFLOW VALVES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Operational Test of the Pressure Control and Monitoring

ACTION	RESULT
1.On the MCDU SYSTEM REPORT/TEST AIR COND menu page: push the line key adjacent to the CPC 1 indication.	On the MCDU: the CAB PRESS CONT 1 page comes on.
2.On the MCDU CAB PRESS CONT 1 menu page: push the line key adjacent to the TEST/CALIBRATION indication.	On the MCDU: the CAB PRESS CONT 1 TEST/CALIBRATION page comes on, the message ECS PACKS ------------ OFF GROUND AIR SUPPLY ---- OFF LFES ----- SET TO 14000 FT ADIRS 1,2,3 ----------- ON MODE SEL ------------ AUTO comes on.
3.On the CABIN PRESS panel 25VU: set the LDG ELEV selector to 14000 FT.	On the ECAM upper display unit: the green MAN LDG ELEV memo message comes on.
	On the ECAM lower display unit: the green AUTO xxx FT indication changes to the green MAN 14000 FT indication.
4.On the MCDU CAB PRESS CONT 1 TEST/CALIBRATION menu page: push the line key adjacent to CONTINUE.	On the MCDU: the message IN PROGRESS (20...90S) comes on, then the message TEST OKAY RESET LFES - > AUTO comes on.

NOTE: Do the test again for CPC 2.

NOTE: Make sure that the automatic cabin-pressure control-system and the three motors on the outflow valve are operative.

Subtask 21-31-00-710-063-A

C. Verification Test Part 3.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE OUTFLOW VALVES ARE CLEAR. MOVEMENT OF THE OUTFLOW VALVES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Operational Test of the Manual Pressure Control and Monitoring

ACTION	RESULT
1.On the CABIN PRESS panel 25VU: move the LDG ELEV selector clockwise away from the AUTO position.	On the ECAM upper display unit: the green MAN LDG ELEV memo message comes on.
	On the ECAM lower display unit: the green AUTO xxx FT indication changes to the green MAN xxx FT indication. NOTE: The actual manual altitude indication depends on the LDG ELEV selector position.
2.On the CABIN PRESS panel 25VU: push and release the MODE SEL pushbutton switch.	On the CABIN PRESS panel 25VU: the white MAN pushbutton switch light comes on.
	On the ECAM lower display unit: the white LDG ELEV indication and the green MAN xxx FT indication goes off. the green SYS 1 (or SYS 2) indication changes to the green MAN indication.
push and hold the MAN V/S CTL toggle switch to DN.	the outflow valve symbol closes.
push and hold the MAN V/S CTL toggle switch to UP.	the outflow valve symbol opens.
release the MAN V/S CTL toggle switch.	the outflow valve symbol stays open.
3.On the CABIN PRESS panel 25VU: push the MODE SEL pushbutton switch.	On the CABIN PRESS panel 25VU: the white MAN pushbutton switch light goes off.
	On the ECAM lower display unit: the white LDG ELEV indication and the green MAN xxx FT indication comes on. the green MAN indication changes to the green SYS 1 (or SYS 2) indication.
4.On the CABIN PRESS panel 25VU: move the LDG ELEV selector counterclockwise to the AUTO position.	On the ECAM upper display unit: the green MAN LDG ELEV memo message goes off.
	On the ECAM lower display unit: the green MAN xxx FT indication changes to the green AUTO xxx FT indication..

5. Close-up
Subtask 21-31-00-865-075-A

A. 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
122VU	RPCU	4HL	X23

Subtask 21-31-00-860-052-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) On the CABIN PRESS panel 25VU, set the LDG ELEV selector to AUTO.
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) On the ADIRS CDU panel 20VU, make sure that the 3 OFF/NAV/ATT switches are in the OFF position and that the ADR1, ADR2 and ADR3 pushbutton switches are pushed (OFF lights on).
(4) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(5) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(6) Make an entry in the aircraft technical log book to tell the flight crew that one safety valve is inoperative.

Subtask 21-31-00-860-052-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) On the CABIN PRESS panel 25VU, set the LDG ELEV selector to AUTO.
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) On the ADIRS MSU panel 41VU, make sure that the 3 OFF/NAV/ATT switches are in the OFF position and that the ADR1, ADR2 and ADR3 pushbutton switches are pushed (OFF lights on).
(4) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(5) On the MCDU, push the line select key adjacent to the RETURN indication until the CFDS menu page comes into view.
(6) Make an entry in the aircraft technical log book to tell the flight crew that one safety valve is inoperative.

Subtask 21-31-00-410-054-A

C. Close Access
(1) Install the access panel (3) and install the food trolleys (1).

Subtask 21-31-00-862-058-A

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

[Rev.10 from 2021] 2026.04.02 06:11:12 UTC