On the AIR COND panel 30VU:
-make sure that the FAULT legend of the PACK 1 and PACK 2 pushbutton switches is off.
Air blows into the fuselage.
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 increases to 280 mbar (4.06 psi).
Tell ground personnel to walk around
the aircraft and do a check for
leakage.
On the MCDU (VSCB indication):
-
the cabin vertical speed is 0. On the MCDU (PDC indication):
-
the cabin differential pressure is 280 mbar (4.06 psi).
On the MCDU (PDC indication):
-
the cabin differential pressure
increases to 580 mbar (8.41 psi). On the MCDU (VSCB indication):
-
the cabin vertical speed must not bemore than 500 ft.min (152.39 m.min).
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
R 5. With the MAN/V/S CTL switch in
R the UP or DN position, keep the
R differential pressure stable at
R 580 mbar (8.41 psi).
R
R 6. On the AIR COND panel 30VU:
R - release the PACK 1 pushbutton
R switch.
R On the CABIN PRESS section of the
R panel 25VU:
R - with the MAN/V/S CTL switch,
R keep the differential pressure
R stable at 580 mbar (8.41 psi).
R 7. On the CABIN PRESS section of the
R panel 25VU:
R - with the MAN/V/S CTL switch in
R DN position, fully close the
R outflow valve (OVP indication
R on MCDU).
R On the AIR COND panel 30VU:
R - release the PACK 2 pushbutton
R switch when the outflow valve
R is closed.
R 8. Monitor the differential pressure
R decrease on the MCDU (PDC
R indication):
R - at 560 mbar (8.12 psi), record
R the cabin vertical speed (VSCB
R indication on the MCDU).
R The leakage rate is permitted
R if the VSCB value (VSCB
R indication on the MCDU) is less
R than 1050 ft.min (320.03
R m.min).
R On the AIR COND panel 30VU:
R - push the PACK 1 and PACK 2
R pushbutton switches (the OFF
R legend is off).
R On the CABIN PRESS section of the
R panel 25VU:
On the MCDU (VSCB indication):
-
the cabin vertical speed is 0. On the MCDU (PDC indication):
-
the cabin differential pressure is 580 mbar (8.41 psi).
On the AIR COND panel 30VU:
-
the OFF legend of the PACK 1
pushbutton switch comes on. On the MCDU (VSCB indication):
-
the cabin vertical speed is 0. On the MCDU (PDC indication):
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