Embraer EMB145 Operation Manual page 2169

PASSENGER OXYGEN
Oxygen supplied to the passengers and flight attendants comes from
chemical oxygen generators and continuous-flow masks installed in
proper dispensing units.
For airplanes Post-Mod. SB 145-35-0008 or equipped with an
equivalent modification factory incorporated, gaseous oxygen supply is
provided in the lavatories.
The dispensing units are located in the right and left overhead bins,
lavatory, and flight attendant stations. Some airplanes are optionally
equipped with an extra dispensing unit installed at the galley area.
Each unit is equipped with one, two, or three continuous flow masks.
The oxygen masks are held in a mask retainer. The mask must be
pulled out of the retainer.
The Passenger Oxygen Control Panel is at the right lateral console,
above the mask stowage box of the copilot. The system is
automatically activated, provided the Passenger Oxygen Selector
Knob is set to the AUTO position and cabin pressure altitude is above
14000 ft (*). The system may be activated manually, at any altitude, by
setting the Passenger Oxygen Selector Knob to MANUAL position.
NOTE: (*) For airplanes equipped with High Altitude Takeoff and
Landing system, passengers masks deploy at 14500 ± 500 ft
cabin altitude.
Dedicated altimetric switch and electric latches assure the automatic
release of the oxygen masks by opening the dispensing units. A timer
circuit is provided to maintain electric latches energized during 6
seconds on automatic or manual mode activation. The oxygen ON
indicator light, on the Passenger Oxygen Control Panel, illuminates to
indicate that the electric latches are energized. In this case, the NO
SMOKING and FASTEN SEAT BELTS signs in the passenger cabin
are automatically illuminated. These indicators and passenger
advisory lights remain illuminated until the oxygen system is reset.
REVISION 41
AIRPLANE
OPERATIONS
MANUAL
Copyright © by Embraer. Refer to cover page for details.
OXYGEN
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