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FCOM 19 AUG 10
Oxygen is supplied for :
‐ 30 s at FL 400,
‐ Descent at 5 000 ft/min from FL 400 to cruise altitude,
‐ Descent at 5 000 ft/min cruise altitude to FL 100,
‐ Flight time at a chosen cruise altitude, read on the chart.
Note: The pax oxygen system is designed such that for a constant pressure and a given
number of pax masks in use the flight time increases for flight levels above 140 up to 200
and decreases for altitudes above.
Applicable to: ,
EMERGENCY DESCENT IN CASE OF RAPID DEPRESSURIZATION
In case of depressurization, oxygen is supplied to passengers in individual units. Their capacity is
such that the aircraft must descend and remain below the following profile.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SPECIAL OPERATIONS
FLIGHT WITHOUT CABIN PRESSURIZATION
A330/A340 FLEET PRO-SPO-20 P 5/12
FCOM 19 AUG 10
(*) Between FL 80 and FL 150, oxygen must be provided for 2 % of the passengers. This is
provided by the portable oxygen system. When it is no longer available, descend to FL 80.
For performance at FL 80/250 kt : Use data for FL 100/LRC (Refer to
PER-CRZ-AEO-CRT-50 CRUISE AT LONG RANGE - ISA CG = 30.0%).
Fuel consumption will be lower by several percent, depending on the aircraft weight.
Applicable to:
EMERGENCY DESCENT IN CASE OF RAPID DEPRESSURIZATION
In case of depressurization, the fixed cabin oxygen system supplies oxygen, stored in
interconnected cylinders. The flow rate is controlled by an altimetric flow regulation device within
each mask container.
Depending on the number of masks used, and on the altitude flown during the descent, the
following chart provides the oxygen supply time.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SPECIAL OPERATIONS
FLIGHT WITHOUT CABIN PRESSURIZATION
A330/A340 FLEET PRO-SPO-20 P 6/12
FCOM 19 AUG 10
Oxygen is supplied for :
‐ 30 s at FL 400,
‐ Descent at 5 000 ft/min from FL 400 to cruise altitude,
‐ Descent at 5 000 ft/min cruise altitude to FL 100,
‐ Flight time at a chosen cruise altitude, read on the chart.
Note: The pax oxygen system is designed such that for a constant pressure and a given
number of pax masks in use the flight time increases for flight levels above 140 up to 180
and decreases for altitudes above.
Applicable to:
Oxygen is supplied for a minimum of 30 min, provided the bottles are filled up to the maximum
nominal pressure and the cabin altitude is at 30 000 ft or below.
SYSTEMS
Applicable to: ALL
FAILURE OCCURRING IN FLIGHT
Apply the abnormal and emergency procedures required by the ECAM.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PROCEDURES
SPECIAL OPERATIONS
FLIGHT WITHOUT CABIN PRESSURIZATION
A330/A340 FLEET PRO-SPO-20 P 7/12
FCOM 19 AUG 10
FAILURE PRESENT AT DISPATCH
�� If flight, with both packs inoperative :
PACK 1 and 2.......................................................................................................................OFF
RAM AIR............................................................................................................................... ON
�� If both CAB PRESS systems are inoperative, or if there is structural damage :
PACK 1 and 2.........................................................................................................................ON
MODE SEL...........................................................................................................................MAN
MAN VALVE SEL...............................................................................................................BOTH
MAN V/S CTL..............................................................................................................AS RQRD
Use MAN V/S CTL to set the outflow valve opening to 50 %.
OUTFLOW VALVE HALF OPEN.....................................................................................CHECK
The outflow valve opening is limited to 50 %, to avoid cabin air suction effect.
MAX FL.....................................................................................................................100 or MSA
TAKEOFF
Limit the aircraft’s rate of climb to about 500 ft/min.
CLIMB
Note: The EXCESS CAB ALT warning may occur.
Use the ECAM CLR pushbutton to clear the warning.
DESCENT
Limit the aircraft’s rate of descent to about 1 000 ft/min. Perform the final approach normally.
PERFORMANCE DATA
Applicable to:
The following table enables the fuel consumption and the time needed from takeoff to landing to be
determined in case of flight without cabin pressurization.
The table is established for :
　
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