PRESSURE CONTROL AND MONITORING - DEACTIVATION/REACTIVATION
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TASK 21-31-00-040-001
Verification Test (Safety Valves and Outflow Valve)
1. Reason for the Job
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Refer to the MMEL TASK: 21-31-04
Pressure Control and Monitoring
Safety Valve
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power R 25-33-41-000-001 Removal of the AFT Galley Unit (6480MM) 31-32-00-860-002 Procedure to Get Access to the SYSTEM REPORT/TEST/AIR
COND Page
31-60-00-860-001 EIS Start Procedure
31-60-00-860-002 EIS Stop Procedure
34-10-00-860-002 ADIRS Start Procedure
34-10-00-860-005 ADIRS Stop Procedure
3. Job Set-up
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Subtask 21-31-00-861-059
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
Subtask 21-31-00-865-059
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------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 21-31-00-010-056
R C. Get Access
R R R (1) Remove the food trolleys, the trolley partition, and the access panel as shown (Ref. TASK 25-33-41-000-001) and get access to the safety valves through the rear galley wall.
Subtask 21-31-00-860-051
D. Aircraft Maintenance Configuration
(1) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. 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. 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. 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).
4. Procedure
_________ Subtask 21-31-00-710-064
A. Verification Test Part 1.
(1) Operational Test of the Safety Valve Position Indicator NOTE : The test procedure is the same for the safety valves 6HL and
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7HL.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On one of the safety valves: On the ECAM lower display unit:
- push the valve diaphragm until the spring is compressed. - the green SAFETY indication changesto 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 green.
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.
1EFF : ALL 1 21-31-00Page 403 1 1 Nov 01/98R 1 1 1CES 1
NOTE : Do this test again for the other safety valve.
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