-
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:

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-
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.

 NOTE : Do this test again for the other safety valve.
____
 5. Close-up
________ Subtask 21-31-00-860-062
 A. Do the EIS stop procedure
 (Ref. TASK 31-60-00-860-002).

 Subtask 21-31-00-410-050
 B. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
 (2) Close the access to the safety valves. Subtask 21-31-00-862-055
 C. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 TASK 21-31-00-720-001
 Functional Test of the Positive and Negative Delta P Protection of the Safety Valves 
R R R R  NOTE : If the test set NORD MICRO PN 0622-19857-01 is not available the test____ set NORD MICRO PN 0622-19857-02 can be used and vise versa. If either one of the test sets is not available send the safety valves to the vendor (NORD MICRO).
 1. Reason for the Job__________________
 Refer to the MPD TASK: 213100-05
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R R  No specific No specific No specific No specific No specific 0622-19857-02  circuit breaker(s) safety clip(s)constant negative pressure supply of minimum 20 mbar (0.3 PSI)constant positive pressure supply of minimum 610 mbar (8.85 PSI) TEST SET - VALVE ACTUATING (0622-19857-01) as alternative to -02access platform 3.4 m (11 ft. 2 in.)1 TEST SET - VALVE ACTUATING
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-31-00-710-006 24-41-00-861-002 24-41-00-862-002 21-31-00-991-001  Operational Test of Safety Valve Position IndicationEnergize the Aircraft Electrical Circuits from the External PowerDe-energize the Aircraft Electrical Circuits Supplied from the External PowerFig. 501

 3. Job Set-up
__________
 (Ref. Fig. 501/TASK 21-31-00-991-001)
 Subtask 21-31-00-861-060

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

 Subtask 21-31-00-010-054
 B. Get Access
 (1) Put the access platform in position at the access panel 312AR.
 (2) Remove the access panel 312AR. R (3) In the cabin remove the food trolleys from the Aft galley and remove
R  the access panel (1) Subtask 21-31-00-865-060
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------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
 4. Procedure
_________
 Subtask 21-31-00-480-053

 A. Functional Test of the Safety Valve
 (1) Installation of the Test Equipment TEST SET - VALVE ACTUATING (0622-19857-02) TEST SET - VALVE ACTUATING (0622-19857-01) as alternative to -02. (Ref. Fig. 501/TASK 21-31-00-991-001)
 (a)
 On the Test Set 1 Make sure that the pressure controller (18) and the vacuum

 (b)
 On the Aircraft: 1 Connect the test wiring to the safety valve

_ controller (25) are fully closed.

R  Safety Valve - Differential Pressure Test Figure 501/TASK 21-31-00-991-001- 12 (SHEET 1)
 1EFF : 1 1 1CES  ALL  1 111 21-31-00 Page 522 Feb 01/04

R  Safety Valve - Differential Pressure Test Figure 501/TASK 21-31-00-991-001- 22 (SHEET 2)
 1EFF : 1 1 1CES  ALL  1 111 21-31-00 Page 523 Feb 01/04
　
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