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DSC-35-30-40 ELECTRICAL SUPPLY
BUS EQUIPMENT LIST......................................................................................................................................1/2
DSC-35-40 PORTABLE OXYGEN SYSTEM
DSC-35-40-10 DESCRIPTION
FLIGHT CREWS PORTABLE OXYGEN SYSTEM.............................................................................................. 1/4
USING THE HOOD.............................................................................................................................................3/4
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
PRELIMINARY PAGES - TABLE OF CONTENTS
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FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
GENERAL
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FCOM 19 AUG 10
DESCRIPTION
Applicable to: ALL
The oxygen system consists of :
A fixed ‐ oxygen system for the cockpit.
‐ A fixed oxygen system for the cabin.
‐ A portable oxygen system.
The oxygen system supplies adequate breathing oxygen to the crew and passengers in case of
depressurization or the presence of smoke or toxic gas.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
GENERAL
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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
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FCOM 19 AUG 10
GENERAL
Applicable to:
The cockpit's fixed oxygen system consists of :
‐ One (or two, as installed) high-pressure cylinder in the left-hand lower fuselage.
‐ One (or two, as installed) pressure regulator, connected directly to the cylinder that delivers
oxygen, at a pressure suitable for user.
‐ Two overpressure safety systems to vent oxygen overboard, through a safety port, if the pressure
gets too high.
‐ A supply solenoid valve that allows the crew to shut off the distribution system.
‐ Four full-face quick-donning masks, stowed in readily-accessible boxes adjacent to the
crewmembers'seats (one at each seat).
‐ One (or two, as installed) filling port for external oxygen replenishment.
GENERAL
Applicable to: ,
The cockpit's fixed oxygen system consists of :
‐ One high-pressure cylinder in the left-hand lower fuselage.
‐ One pressure regulator, connected directly to the cylinder that delivers oxygen, at a pressure
suitable for user.
‐ Two overpressure safety systems to vent oxygen overboard, through a safety port, if the pressure
gets too high.
‐ A supply solenoid valve that allows the crew to shut off the distribution system.
‐ Four full-face quick-donning masks, stowed in readily-accessible boxes adjacent to the
crewmembers'seats (one at each seat).
‐ One filling port for external oxygen replenishment (as installed).
OPERATION
Applicable to:
The crewmember squeezes the red grips to pull the mask out of its box, and this action causes the
mask harness to inflate.
A mask-mounted regulator supplies a mixture of air and oxygen or pure oxygen, or performs
emergency pressure control. With the regulator set to NORMAL, the user breathes a mixture of cabin
air and oxygen up to the cabin altitude at which the regulator supplies 100 % oxygen. The user can
select 100 %, in which case the regulator supplies pure oxygen at all cabin altitudes.
If the situation calls for it, the user can use the emergency overpressure rotating knob and receive
pure oxygen at positive pressure.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
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FCOM 19 AUG 10
The storage box contains a microphone lead, with a quick-disconnect, for connection to the
appropriate mask microphone cable.
Note: Each mask may have a removable film that protects the visor against scratches. This strip
is optional and may be removed from the mask at any time.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
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FCOM 19 AUG 10
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
OXYGEN
FIXED OXYGEN SYSTEM FOR COCKPIT - DESCRIPTION
A330/A340 FLEET DSC-35-20-10 P 4/8
FCOM 19 AUG 10
OPERATION
Applicable to: ,
The crewmember squeezes the red grips to pull the mask out of its box, and this action causes the
mask harness to inflate.
　
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