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with one hand. This is accomplished by squeezing the red tabs on either side of the
oxygen line to inflate the harness while pulling the mask from the container. The
inflated harness is placed over the head, and the mask is positioned over the nose and
mouth. Releasing the red tabs deflates the harness, pulling the mask snugly against the
face.
EMERGENCY EQUIPMENT
For Training Purposes Only
May 03
8-5
P I LOT T R A I N I N G GU I D E
The harness is not designed to be donned over headsets or
eyeglasses. These should be removed prior to using the mask.
Flight Deck Oxygen Masks
Figure 8-2
NOTE
Press to
Test/
Emergency
Button
Plate
(inflation
control)
Microphone
Lead
Microphone
Regulator
"N-100%"
Manual
Control
Reset/Test
Switch
Oxygen
Line
Oxygen
Supply
Stowage
Box Microphone
Jack
Oxygen
"ON"
Indicator
Flow
Indicator
Reset/
Test
Switch
Oxygen
Shutoff
Valve
Inflatable
Harness
Mask
P604_08_008
Mask
Regulator
Oxygen
Line
EMERGENCY EQUIPMENT
8-6 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Quick-Donning Oxygen Mask Settings
Figure 8-3
EICAS Messages
MESSAGE MEANING AURAL WARNING
(IF ANY)
GALLEY OVHT Galley overheat detected (if galley overheat detector
installed). TRIPLE ATTENSON
SMOKE BAGGAGE BAY The detector has sensed smoke in the baggage door
compartment. “SMOKE”
SMOKE TOILET The detector has sensed smoke in the lavatory area. “SMOKE”
OXY LO PRESS Crew oxygen bottle pressure is less than 800 psi.
PAX OXY ON Passenger oxygen masks are deployed.
EICAS Messages
Table 8-1
N
100%
PUSH
EMERGENCY
PRESS
TO
TEST
N
100%
PUSH
EMERGENCY
PRESS
TO
TEST
P604_08_011
NORMAL &
HALF-CIRCLE
100% &
HALF-CIRCLE
EMERGENCY PRESS TO TEST
N
100%
PUSH
EMERGENCY
PRESS
TO
TEST
N
100%
PUSH
EMERGENCY
PRESS
TO
TEST
EMERGENCY
OXYGEN
MASK
PRESS
TO
TEST
AND
RESET
EROS
100%
PUSH
OXYGEN STOWAGE BOX
Release Lever
Emergency
Flow Control
Oxygen
Supply Hose
Reset / Test
Lever
Blinker
Normal /
100% Lever
EMERGENCY EQUIPMENT
For Training Purposes Only
May 03
8-7
P I LOT T R A I N I N G GU I D E
Passenger Oxygen
The dropdown masks are controlled by the PASSENGER OXYGEN control panel
which is located on the copilot’s side console. There are three modes of operation:
• CLOSED – Stops the oxygen supply to the dropdown masks
• NORMAL – The dropdown masks deploy when the altimetric valve senses the
cabin altitude is greater than 10,500 feet or 14,500 feet (aircraft S/N dependent)
and oxygen is supplied to the masks
• OVERRIDE – The dropdown masks deploy and oxygen is supplied to the masks
In the event the dropdown masks do not deploy, the door on the mask box can be
opened by inserting a long, thin object into the release hole.
Passenger Oxygen Control Panel
Figure 8-4
Therapeutic
Therapeutic oxygen is controlled from the flight compartment by a switch/light on the
PASSENGER OXYGEN control panel. Selecting the switch to ON illuminates the
light and oxygen will be supplied to the ports in the cabin for first aid use.
PASSENGER OXYGEN
THERAPEUTIC
OXYGEN
ON
TEST
PORT
NORMAL
CLOSED OVERRIDE
P604_08_013
EMERGENCY EQUIPMENT
8-8 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
Emergency Exits
Refer to Chapter 1 Airplane General for operation of the passenger door and the
overwing emergency exit.
Main Entrance Door
The main entrance door is classified as a Type I emergency exit and is the normal
means of exit in an emergency.
Overwing Emergency Exit
The overwing emergency exit is a removable plug-type hatch and provides access to
the right upper wing surface. It is classified as a Type III emergency exit. This
emergency exit has an escape rope (lifeline) stored to the right of the exit window,
with one end attached to the fuselage.
Emergency Egress Lighting
The Challenger 604 is equipped with an Emergency Egress Lighting System that
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