-
the cabin differential pressure is 580 mbar (8.41 psi).

On the lower ECAM display unit, on the CAB PRESS page:

-
the outflow valve is in the fully

closed position. On the AIR COND panel 30VU:

-
the OFF legend of the PACK 2

pushbutton switch comes on. On the MCDU (PDC indication):

-
the cabin differential pressure indication decreases.

On the MCDU (VSCB indication):
-
the cabin vertical speed must not be

more than 500 ft.min (152.39 m.min). On the MCDU (PDC indication):

-
the cabin differential pressure decreases to 0.

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-with the MAN V/S CTL switch,
 decrease the cabin differential
 pressure until you get a
 differential pressure of 0 psi.

 NOTE : The cabin vertical speed
____
 must not be more than 500
 ft.min (152.39 m.min)
 (VSCB indication on the
 MCDU).

 9. Wait until the cabin is fully
 depressurized then fully open the
 outflow valve (OVP indication on
 MCDU).

 **ON A/C ALL
 5. Close-up
________
 Subtask 05-53-00-865-055
 A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
R **ON A/C 062-099, 106-149, 151-199, 201-299, 301-399, 401-499,
 122VU DOORS/PAX/MONG 1MQ T13

 **ON A/C ALL
 Subtask 05-53-00-860-060
 B. Put the aircraft back to its initial configuration.
 (1)
 Shut down the APU (Ref. TASK 12-33-21-618-001) or stop the HP ground-air supply unit (Ref. TASK 12-33-21-618-001).

 (2)
 on the EXT LT section of the panel 25VU:

 -set the BEACON switch to OFF position.

 (3)
 Remove the safety plug from the pressure switch 16WR.

 (a) In the avionics compartment:
 -
Remove the safety streamer from the safety plug.

 -
Remove the safety plug with its O-ring from the air inlet of the pressure switch 16WR.

 (4)
 If you removed the crew oxygen masks, install them (Ref. TASK 35-12-41-400-002)

 (5)
 Put the system and the aircraft back to the serviceable
 configuration.

 (6)
 Do the ADIRS stop procedure (Ref. TASK 34-10-00-860-005).

 (7)
 Do the EIS stop procedure (Ref. TASK 31-60-00-860-002).

 (8)
 De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

 (9)
 Remove the warning notices and the safety barriers.

 DEMAGNETIZATION - MAINTENANCE PRACTICES
_______________________________________
 TASK 05-54-00-860-001
 Demagnetization of the External Parts of the Frames of the Windshield and Sliding Windows
 1. Reason for the Job
__________________
 The demagnetization procedure is applicable to the external parts of the frames of the windshield and sliding windows.
 Use this procedure if you are sure that incorrect deviation of the standby compass occurs after adjustment on the compensation base.
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
DM05275A 1 DEMAGNETIZER - 110V/60HZ DM05275B 1 DEMAGNETIZER - 220V/50HZ MGM50 1 GAUSSMETER
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
34-22-00-730-001 Compensation Adjustment/Test of the Standby Compass 34-22-23-000-001 Removal of the Standby Compass (2FN) 34-22-23-400-001 Installation of the Standby Compass (2FN)
 3. Job Set-up
__________ Subtask 05-54-00-860-050
 A. Aircraft Configuration
 (1) Make sure that the A/C is not energized (batteries, engines or external power supply).

 Subtask 05-54-00-010-050

 B. Removal of the Standby Compass
 (1) Remove the standby compass (Ref. TASK 34-22-23-000-001) from the cockpit and keep it away from magnetic sources.
　
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