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Hydraulic Shutoff
Pneumatic Shutoff
AC Power Shutoff
Fire Extinguishing System Armed
DISCH
PULL
1 2
A
P
U
Fire Extinguishing
System Armed
Pneumatic
Shutoff
GX_09_011
For Training Purposes Only
Sept 04
9-13
P I LOT T R A I N I N G GU I D E
FIRE PROTECTION
ENGINE FIRE
When an engine DISCH fire handle is pulled, the ENGINE FUEL SOV is commanded
closed, preventing fuel flow to the engine.
NOTE
Pulling the fire DISCH handle does not command an immediate
engine shutdown. In the event of a fire, the engine should be
shut down, using the ENGINE RUN switches which will close the
high pressure fuel shutoff valve (HPSOV).
To discharge an engine bottle, the handle must be turned fully and held (at least one
second) to overcome the spring force of the handle; counterclockwise (bottle 1) or
clockwise (bottle 2). This action will send redundant commands to discharge the
selected fire extinguisher bottle into the armed zone. When a handle is turned fully in
the opposite direction, the remaining bottle will be discharged.
DISCH
PULL
1 2
L/R
“BOTTLE 1”
HANDLE PULLED, ROTATED
TO THE LEFT
“BOTTLE 2”
HANDLE PULLED, ROTATED
TO THE RIGHT
ENGINE FIRE HANDLE
GX_09_012
9-14 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
FIRE PROTECTION
APU FIRE
To discharge the APU bottle, the handle must be turned fully and held (at least one
second) to overcome the spring force of the handle; counterclockwise (bottle 1) or
clockwise (bottle 2). This action will send redundant commands to discharge the
selected fire extinguisher bottle into the armed zone.
To discharge the second extinguisher bottle, the lockout release pin must be slid to the
right, to allow the handle to be rotated back to the center position. This is most often a
two handed operation. The additional step for the APU is deemed necessary to
preserve one bottle for possible engine fire. When a handle is turned fully in the
opposite direction, the remaining bottle will be discharged.
“BOTTLE 1”
HANDLE PULLED, ROTATED
TO THE LEFT
“BOTTLE 2”
HANDLE PULLED, ROTATED
TO THE RIGHT
APU FIRE HANDLE
DISCH
PULL
1 2
A
P
U
GX_09_013
APU Lockout
Release Pin
For Training Purposes Only
Sept 04
9-15
P I LOT T R A I N I N G GU I D E
FIRE PROTECTION
SHUTOFF VALVES (SOV)
The following valves are commanded closed as a function of pulling the applicable
fire DISCH handle.
PULL
A
P
U
DISCH
1 2
APU
LP
L
OFF
R
HP
LP
HP 45
PSI
0
PSI
APU
32 °C 32 °C
3A 3B 2B
HYDRAULIC
RAT
22 °C
1B
62%
38 °C
63%
20 °C
62%
Hydraulic
Shutoff Valves
Note:
The right SOV is shown,
operation of the left is
similar.
HYDRAULIC SYNOPTIC PAGE
APU and Engine
Feed Shutoff Valves
Note:
The left engine SOV
is shown, operation
of the right is similar.
DISCH
PULL
1 2
L
DISCH
PULL
1 2
A
P
U
BLEED/ANTI-ICE SYNOPTIC PAGE
High Pressure Valve (HPV)
and Pressure Regulator
Valves (PRV)
FUEL SYNOPTIC PAGE
HPV PRV
APU
FADEC
BLEED
MANAGEMENT
COMPUTER
NOTE:
The left bleed valves are
shown, operation of the
right is similar.
GX_09_014
DISCH
PULL
1 2
L
DISCH
1 2
RPULL
9-16 For Training Purposes Only
Sept 04
P I LOT T R A I N I N G GU I D E
FIRE PROTECTION
FIRE EXTINGUISHER ASSEMBLY
The designated fire zones are left engine, right engine and APU. There are two fire
extinguisher bottles on each airplane attached to the left rear fuselage structure. Each
fire extinguisher bottle incorporates a hermetically-sealed pressure vessel filled with
Halon 1301. The forward fire extinguisher bottle is designated as bottle 1, and the aft
fire extinguisher is designated as bottle 2.
FIRE EXTINGUISHER DISCHARGE BOTTLES
Each bottle in the Fire Extinguisher Assembly has three discharge ports. Each of these
ports are designated toward one of the fire zones (left engine, right engine or APU
enclosure). Therefore the contents of a bottle can be directed into any one of these
three zones, if required.
A fire extinguisher discharge squib (electro-explosive device) is installed in each
　
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