R 1EFF : 151-199, 401-499, 1 05-53-00Page 545 1 1 Aug 01/05 1 1 1CES 1
R **ON A/C 301-399,
R Subtask 05-53-00-780-052-B
R A. Procedure to Measure the Leakage Rate
R WARNING : DO NOT LET THE CABIN ALTITUDE CHANGE TOO FAST. SUDDEN CHANGES_______
R IN PRESSURE CAN CAUSE INJURY TO PERSONS.
R WARNING : MAKE SURE THAT THE DIFFERENTIAL PRESSURE IS NOT MORE THAN THE_______
R VALUE SPECIFIED FOR THIS TEST.
R WARNING : DO NOT USE THE ECAM DISPLAYS TO READ THE CABIN PRESSURE_______
R PARAMETERS (CABIN DIFFERENTIAL PRESSURE, CABIN ALTITUDE, CABIN
R VERTICAL- SPEED) DURING THIS TEST.
R THE PRESSURES USED IN THIS TEST ARE MORE THAN THE MAXIMUM LIMIT
R OF THE RELATED PRESSURE SENSOR.
R WHEN THESE PRESSURES BECOME MORE THAN THE PRESSURE SENSOR
R LIMIT, ON THE ECAM DISPLAY:
R - THE CABIN DIFFERENTIAL PRESSURE INDICATION BECOMES AMBER XX
R - THE CABIN ALTITUDE INDICATION BECOMES AMBER XX
R - THE CABIN VERTICAL-SPEED INDICATION IS NO LONGER CORRECT. IF
R YOU DO NOT KNOW THE CORRECT CABIN PRESSURE VALUES, YOU CAN MAKE
R UNWANTED CHANGES IN PRESSURE THAT CAN CAUSE INJURY.
R NOTE : This procedure uses the MAN V/S CTL switch on the CABIN PRESS____
R section of the panel 25VU to control the cabin pressure.
R This switch, spring loaded to neutral, controls the outflow valve
R position:
R - UP: the outflow valve moves to the open position (the cabin
R pressure decreases)
R - DN: the outflow valve moves to the closed position (the cabin
R pressure increases)
R We recommend:
R - short action on this switch (do not hold the switch in the UP or
R DN position)
R - that you monitor the cabin vertical speed indication
R to prevent sudden changes in cabin pressure.
R 1EFF : 301-399, 1 05-53-00Page 546 1 1 May 01/04 1 1 1CES 1R -------------------------------------------------------------------------------R ACTION RESULT R -------------------------------------------------------------------------------
R 1. On the AIR COND panel 30VU:
R - adjust the cabin temperature
R control as necessary.
R
R
R 2. On the CABIN PRESS section of the
R panel 25VU:
R - set the MAN V/S CTL switch to
R DN and release, the switch
R moves to the neutral position.
R Do this operation several
R times. This closes the outflow
R valve.
R NOTE : The cabin vertical speed____
R must not be more than 500
R ft.min (152.39 m.min).
R - stop when you get a cabin
R pressure of value A (Pamb + 280
R mbar (4.06 psi)).
R 3. With the MAN/V/S CTL switch in
R the UP or DN position, keep the
R pressure stable at value A (Pamb
R + 280 mbar (4.06 psi)) for 5
R minutes.
R
R
R
R 4. Use the same method as in step 2
R to increase cabin pressure to
R value B (Pamb + 580 mbar (8.41
R psi)).
R
R NOTE : the cabin vertical speed____
R must not be more than 500
R ft.min (152.39 m.min).
R 5. With the MAN/V/S CTL switch in
R the UP or DN position, keep the
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 vertical speed indicator:
-
the cabin vertical speed must not be
more than 500 ft.min (152.39 m.min). On the pressure indicator:
-
the cabin pressure increases to value A (Pamb + 280 mbar (4.06 psi)).
Tell ground personnel to walk around
the aircraft and do a check for
leakage.
On the vertical speed indicator.
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