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the passengers and crew.
The systems covered in this chapter are:
• Oxygen system
• Emergency exits
• Locating devices
• Miscellaneous emergency equipment
This chapter deals only with factory-installed equipment. Individual aircraft may have
other important emergency equipment installed. Refer to your Aircraft Operating
Manual and Airplane Flight Manual supplements for the use of items installed at the
Completion Center.
Oxygen System
Description
An 1850-psi gaseous oxygen system is installed at the factory to supply oxygen to the
flight crew and passengers during an emergency. The oxygen system consists of the
following subsystems:
• Flight compartment
• Passenger compartment
• Therapeutic
• Portable oxygen bottle
There are two different configurations of oxygen supply bottles installed on the
Challenger 604. Although each configuration is unique, there is no difference in
operation.
Components and Operation
Single-Bottle System
The single-bottle system consists of one storage bottle, a ground servicing panel, and
associated masks/regulators. The oxygen storage bottle (1260 liters/50.0 cubic feet) is
located in the forward avionics bay.
Dual-Bottle System
The dual-bottle system consists of two storage bottles, a ground servicing panel, and
associated masks/regulators. The flight compartment and passenger oxygen storage
bottles (2603 liters/115 cubic feet per bottle) are located in the forward avionics bay.
EMERGENCY EQUIPMENT
8-2 For Training Purposes Only
Jan 04
P I LOT T R A I N I N G GU I D E
Oxygen for the flight crew is provided through a diluter demand regulating system. A
quick-donning, inflatable harness mask is installed in a container at each side console.
Portable Oxygen Bottle
A portable oxygen bottle is provided for the crew to use in moving around the cabin
and is normally located in a placarded position behind the pilot.
Passenger Compartment
Dropdown masks installed above all of the passenger seats and in the lavatory provide
passenger oxygen. The passenger masks are fixed-dilution (free-flow) type, which
provides a mixture of oxygen and cabin air at ambient pressure. They are designed for
use at cabin pressure altitudes below 25,000 feet. When the passenger oxygen system
is active, the PAX OXY ON caution EICAS message is displayed.
Therapeutic
Provisions are made to install therapeutic oxygen ports in the passenger compartment.
This system is used for first aid and normally supplies oxygen to four ports (forward
left, aft left, forward right and aft right) at mid-height along the cabin.
Controls and Indicators
Overboard Discharge Indicator(s)
If the oxygen storage bottle pressure becomes excessive, all oxygen will be vented
overboard through a relief valve in the right forward fuselage.
Single-Bottle System
A green frangible disk located below and aft of the ground servicing panel will
fragment to indicate the relief valve has activated due to an overpressure. The relief
valve will activate when the HP module pressure exceeds approximately 2600 psi or
when the LP module pressure exceeds 130 psi.
Dual-Bottle System
In dual-bottle systems, there are two green frangible disks located below and aft of the
ground servicing panel to indicate that the relief valve has activated. One disk will
rupture if the HP module pressure exceeds approximately 2800 psi. The other disk will
rupture if the LP module pressure exceeds 90 psi.
In all cases, an amber OXY LO PRESS message will be displayed on the EICAS when
the oxygen pressure falls below 800 psi.
EMERGENCY EQUIPMENT
For Training Purposes Only
May 03
8-3
P I LOT T R A I N I N G GU I D E
Oxygen System Panel
Figure 8-1
BRT
FUEL TEMP
ENGINE
BULK
OXY
C ALT
RATE
P
70 75
1840
3200
200
SPOILERS -0.5
-4
1990
1900
1805
1710
1620
1530
1435
1340
100
80
60
40
20
0
-20
-40
OXY CYL SERVICING
CHARGE CYL AT
RATE NOT TO EXCEED
200 PSI (1379)
MIN. TO “FULL”
PRESSURE
FULL PRESS
AMBIENT
TEMP
STATUS PAGE
Bonding
Jumper
Refill Line
(High press.to
oxygen bottle)
Ground Service
Panel Indicator
Filler Valve Dust Cap and
Chain Assy
Oxygen Pressure
Green
Amber
- 800 psi and above
- below 800 psi
P604_08_007
Service Panel
13720
13100
12445
　
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