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It is located on the rear bulkhead of the baggage compartment. It supplies the system with oxygen with a pressure reduced to approximately 75 psi (5 bars) with a pressure reducing valve. The pressure reducing valve is equipped with a charging valve and a pressure gage. B. Oxygen masks Oxygen masks are stored in headrests. With regulated-flow type front seat masks The front seat masks are pressure-demand types and equipped with a microphone. The regulator consists of a two-position selector : "NORMAL" and "100 %". The passenger masks are of constant-flow type. On each oxygen mask, a flow indicator is integrated to the supply pipe. When pressure is normal, a green range appears and when pressure is low, a red range appears. With constant-flow type front seat masks The oxygen masks are constant-flow type. On each oxygen mask, a pressure indicator is integrated to the supply pipe. When pressure is normal, a green range appears and when pressure is low, a red range appears. The front seat masks are equipped with a microphone. C. Oxygen control lever The oxygen control lever allows opening and closing of oxygen cylinder through a semi-rigid control. It is located on the overhead panel. D. Pressure gage The pressure gage allows the pilot to check the oxygen cylinder charging level. It is connected to the oxygen cylinder by a high pressure capillary line. It is located on the overhead panel. E. Oxygen connecting plugs The oxygen connecting plugs (for quick connection) are located on the upper duct. They allow to connect oxygen masks to ensure oxygen supply. 1 - Oxygen lever control 2 - Pressure gage 3 - Headrest : storage of FWD mask 4 - Headrest : storage of rear mask 5 - Oxygen cylinder 6 - Oxygen control 7 - Low pressure outlet union 8 - Low pressure system (oxygen supply) 9 - Pressure gage supply system (overhead panel) 10 - Bonding strap 11 - Oxygen connecting plugs 12 - Overpressure valve 13 - Control mechanism 14 - Pressure gage (cylinder) 15 - Oxygen cylinder attaching clamp 16 - Charging valve 17 - High pressure outlet union 18 - Pressure reducing valve Oxygen - Schematic Key to Figure 1 |
