DOC AIRBUS | AMM A320FCREW OXYGEN - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
1. General
The flight crew oxygen-system supplies supplement oxygen and gives protection to the eyes and respiratory system of the crew members.
It is used in the conditions that follow:
The system has three sections:
** ON A/C NOT FOR ALL The flight crew oxygen-system supplies supplement oxygen and gives protection to the eyes and respiratory system of the crew members.
It is used in the conditions that follow:
- Loss of cabin pressurization (hypoxia protection)
- Smoke and poisonous fumes
- If one pilot remaining on station
- Pre-flight checks by the pilots.
The system has three sections:
- Oxygen storage (Ref. AMM D/O 35-11-00-00)
- Oxygen distribution (Ref. AMM D/O 35-12-00-00)
- Control and indicating (Ref. AMM D/O 35-13-00-00).
2. System Description
The oxygen system supplies oxygen to the flight crew.
It supplies oxygen to the Captain (CAPT), the First Officer (F/O) and the third Occupant (OCCPNT) stations.
The equipment with the inlet of the Low Pressure (LP) oxygen-supply solenoid-valve is a part of the oxygen storage sub-system.
For the oxygen storage sub-system, a source supply line receives the LP oxygen from the pressure regulator/transmitter and supplies it to the LP oxygen-supply solenoid-valve.
The LP oxygen-supply solenoid-valve has an electrical shutoff function between the oxygen supply sub-system and the downstream crew distribution sub-system.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, only the CREW SUPPLY pushbutton switch is for the oxygen system. Its function is to start or close the system.
The crew oxygen system consists of two separated subsystems.
The first system supplies oxygen to the Captain (CAPT) and third Occupant (OCCPNT) stations, and the second system supplies oxygen to the First Officer (F/O) and fourth OCCPNT stations.
The equipment with the inlet of each Low Pressure (LP) oxygen-supply solenoid-valve is a part of each of the two oxygen storage sub-systems.
For each oxygen storage sub-system, a fully isolated source supply line receives the LP oxygen from the pressure regulator/transmitter and supplies it to the LP oxygen-supply solenoid-valve.
The LP oxygen-supply solenoid-valve has an electrical shutoff function between the oxygen supply sub-system and the downstream crew distribution sub-system.
Each system is mechanically isolated from the other system. Thus, if there is a malfunction in one of the systems, this will not have an effect on the other system.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, only the CREW SUPPLY pushbutton switch is for the two systems. Its function is to start or close the two systems at the same time.
The oxygen system supplies oxygen to the flight crew.
It supplies oxygen to the Captain (CAPT), the First Officer (F/O) and the third Occupant (OCCPNT) stations.
The equipment with the inlet of the Low Pressure (LP) oxygen-supply solenoid-valve is a part of the oxygen storage sub-system.
For the oxygen storage sub-system, a source supply line receives the LP oxygen from the pressure regulator/transmitter and supplies it to the LP oxygen-supply solenoid-valve.
The LP oxygen-supply solenoid-valve has an electrical shutoff function between the oxygen supply sub-system and the downstream crew distribution sub-system.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, only the CREW SUPPLY pushbutton switch is for the oxygen system. Its function is to start or close the system.
The crew oxygen system consists of two separated subsystems.
The first system supplies oxygen to the Captain (CAPT) and third Occupant (OCCPNT) stations, and the second system supplies oxygen to the First Officer (F/O) and fourth OCCPNT stations.
The equipment with the inlet of each Low Pressure (LP) oxygen-supply solenoid-valve is a part of each of the two oxygen storage sub-systems.
For each oxygen storage sub-system, a fully isolated source supply line receives the LP oxygen from the pressure regulator/transmitter and supplies it to the LP oxygen-supply solenoid-valve.
The LP oxygen-supply solenoid-valve has an electrical shutoff function between the oxygen supply sub-system and the downstream crew distribution sub-system.
Each system is mechanically isolated from the other system. Thus, if there is a malfunction in one of the systems, this will not have an effect on the other system.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, only the CREW SUPPLY pushbutton switch is for the two systems. Its function is to start or close the two systems at the same time.
A. Oxygen Storage
(Ref. AMM D/O 35-11-00-00)
The High Pressure (HP) oxygen cylinder supplies oxygen to the flight crew.
The cylinder is installed between frames 11 and 13 in the avionics compartment. You can fill the HP oxygen cylinder through its filling port. The filling port is connected to the filling connector installed on the pressure regulator/transmitter.
The head of the HP oxygen cylinder is directly connected to a pressure regulator/transmitter. This pressure regulator/transmitter supplies the LP oxygen to the distribution circuit.
The oxygen system includes an overboard discharge system which controls an overpressure in the HP and/or in the LP oxygen lines of the system.
(Ref. AMM D/O 35-11-00-00)
Two High Pressure (HP) oxygen cylinders supply oxygen to the flight crew.
The first HP oxygen cylinder is installed between frames 11 and 12 in the left part of the avionics compartment.
The second HP oxygen cylinder is installed between frames 16 and 17 in the left part of the avionics compartment.
Each HP oxygen cylinder is filled through its filling port. The filling port is connected to the filling connector installed on the pressure regulator/transmitter.
The head of each HP oxygen cylinder is directly connected to a pressure regulator/transmitter. These pressure regulators/transmitters supply the LP oxygen to the distribution circuit.
The system includes an overboard discharge system for safety, if an overpressure occurs in the HP and/or in the LP oxygen lines of the system.
(Ref. AMM D/O 35-11-00-00)
The High Pressure (HP) oxygen cylinder supplies oxygen to the flight crew.
The cylinder is installed between frames 11 and 13 in the avionics compartment. You can fill the HP oxygen cylinder through its filling port. The filling port is connected to the filling connector installed on the pressure regulator/transmitter.
The head of the HP oxygen cylinder is directly connected to a pressure regulator/transmitter. This pressure regulator/transmitter supplies the LP oxygen to the distribution circuit.
The oxygen system includes an overboard discharge system which controls an overpressure in the HP and/or in the LP oxygen lines of the system.
(Ref. AMM D/O 35-11-00-00)
Two High Pressure (HP) oxygen cylinders supply oxygen to the flight crew.
The first HP oxygen cylinder is installed between frames 11 and 12 in the left part of the avionics compartment.
The second HP oxygen cylinder is installed between frames 16 and 17 in the left part of the avionics compartment.
Each HP oxygen cylinder is filled through its filling port. The filling port is connected to the filling connector installed on the pressure regulator/transmitter.
The head of each HP oxygen cylinder is directly connected to a pressure regulator/transmitter. These pressure regulators/transmitters supply the LP oxygen to the distribution circuit.
The system includes an overboard discharge system for safety, if an overpressure occurs in the HP and/or in the LP oxygen lines of the system.
B. Oxygen Distribution
(Ref. AMM D/O 35-12-00-00)
Oxygen is supplied to the flight crew stations through a distribution circuit. The distribution circuit has the components that follow:
Oxygen is supplied to the flight crew stations through the distribution circuits that operate independently. Each distribution circuit has the components that follow:
(Ref. AMM D/O 35-12-00-00)
Oxygen is supplied to the flight crew stations through a distribution circuit. The distribution circuit has the components that follow:
- An LP solenoid supply-valve
- A distribution manifold
- The LP stainless-steel distribution-pipes
- The Supply hoses and stowage boxes
- The Full-face/quick-donning oxygen masks with a demand regulator.
Oxygen is supplied to the flight crew stations through the distribution circuits that operate independently. Each distribution circuit has the components that follow:
- An LP solenoid supply-valve
- A distribution manifold
- The LP stainless-steel distribution-pipes
- The Supply hoses and stowage boxes
- The Full-face/quick-donning oxygen masks.
C. Control and Indicating
(Ref. AMM D/O 35-13-00-00)
The indicating system controls and monitors the crew oxygen system.
The DOOR/OXY page on the ECAM DU shows the pressure of the oxygen cylinder.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, there is one CREW SUPPLY pushbutton switch that operates the LP solenoid supply-valve in oxygen sub-system.
An oxygen filling indicator is installed near filling port to give the HP filling pressure.
(Ref. AMM D/O 35-13-00-00)
The indicating system controls and monitors the crew oxygen system.
The DOOR/OXY page on the ECAM DU shows pressure for the two cylinders, one for the CAPT's oxygen cylinder, and the second for the F/O's oxygen cylinder.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, there is one CREW SUPPLY pushbutton switch that operates the LP solenoid supply-valves in the applicable oxygen storage sub-system.
An oxygen filling indicator is installed near the filling port to give the HP filling pressure.
(Ref. AMM D/O 35-13-00-00)
The indicating system controls and monitors the crew oxygen system.
The DOOR/OXY page on the ECAM DU shows the pressure of the oxygen cylinder.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, there is one CREW SUPPLY pushbutton switch that operates the LP solenoid supply-valve in oxygen sub-system.
An oxygen filling indicator is installed near filling port to give the HP filling pressure.
(Ref. AMM D/O 35-13-00-00)
The indicating system controls and monitors the crew oxygen system.
The DOOR/OXY page on the ECAM DU shows pressure for the two cylinders, one for the CAPT's oxygen cylinder, and the second for the F/O's oxygen cylinder.
In the cockpit, on the OXYGEN section of overhead control and indicating panel 21VU, there is one CREW SUPPLY pushbutton switch that operates the LP solenoid supply-valves in the applicable oxygen storage sub-system.
An oxygen filling indicator is installed near the filling port to give the HP filling pressure.
D. Crew System Arrangement
(2) General diagram
Crew Oxygen System - Schematic ** ON A/C NOT FOR ALL
Crew Oxygen System - Schematic ** ON A/C NOT FOR ALL
Crew Oxygen System - Schematic ** ON A/C NOT FOR ALL Crew Oxygen System - Schematic ** ON A/C NOT FOR ALL