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compartment. Each bottle has a low pressure switch and a pressure gauge. When
either BOTTLE ARMED PUSH TO DISCHARGE DISCH switchlight is pushed, both
bottles will discharge simultaneously. The high rate discharge bottle is designed to
quickly deliver extinguishing agent into the cargo compartment for initial fire
suppression. The low rate discharge bottle discharges slowly, maintaining a flow of
extinguishing agent into the cargo compartment (over a 30 minute period) to prevent
re-ignition and allow for aircraft diversion. If either bottle pressure decrease to a preset
point, the pressure switch opens, and a CARGO BTL LO caution message will be
displayed on the EICAS primary page.
REV 56, Jan 31/03
Vol. 1 10--20--18
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual MASTER
CSP A--013
Cargo Compartment Fire Protection
Figure 10---20---10
NORMAL (STANDBY)
CARGO SMOKE
(coverguard)
PUSH Switch/Lights
Come on (red) when
a smoke condition is
detected in the cargo
compartment.
Pressed in --
Respective squib of
cargo compartment
firex bottle is armed.
Pressed out --
Respective squib of
cargo compartment
firex bottle is
disarmed.
NORMAL (STANDBY),
BOTTLE ARMED PUSH TO DISCH Switch/Lights
Come on (green) when the respective CARGO SMOKE PUSH switch/light
is pressed in, to indicate that the cargo compartment firex bottle is charged
and the respective squib is armed.
Pressed in --Squibs in both bottles fire.
NOTE
BOTTLE ARMED -- PUSH TO DISCH
Green light goes out once the firex
bottle is discharged (goes out when
CARGO BTL LO caution message
comes on).
CARGO
ARMED
CARGO FIREX
NORMAL STANDBY
SMOKE
PUSH
BOTTLE
PUSH TO
DISCH
CARGO
SMOKE ARMED
PUSH
BOTTLE
PUSH TO
DISCH
Vol. 1 10--20--19
REV 56, Jan 31/03
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual
CSP A--013
MASTER
Cargo Compartment Firex Monitor --- Schematic
Figure 10---20---11
WITHIN
A BOTTLE
CARGO
SMOKE
PUSH
BOTTLE
ARMED
PUSH TO
DISCH
CARGO
SMOKE
PUSH
BOTTLE
ARMED
PUSH TO
DISCH
NORMAL STANDBY
TO EICAS
TO DISCHARGE
NOZZLE
SMOKE DETECTOR 1
ALARM OUTPUT
TEST INPUT
SQUIB 1
SQUIB 2
LOW
PRESSURE
SWITCH
BOTTLE #1
TO
EICAS
BOTTLE #2
PRESSURE
GAUGE
TO
EICAS
BOTTLE
RUPTURE
DISC
METERING
ORIFICE
METERING
ORIFICE
SQUIB 2
TO
EICAS
SMOKE DETECTOR 2
ALARM OUTPUT
TEST INPUT
REV 56, Jan 31/03
Vol. 1 10--20--20
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual MASTER
CSP A--013
Cargo Compartment Smoke --- EICAS Indications <MST>
Figure 10---20---12
Status Page
<0039>
<0039>
Primary Page
<0039>
<0006>
CARGO BTL LO
SMOKE CARGO
CARGO SQUIB 1
CARGO SQUIB 2
SMOKE CARGO
Warning (red)
Comes on to indicate
that a smoke condition
exists in the cargo
compartment.
CARGO BTL LO
Caution (amber)
Comes on to indicate
that the cargo
compartment bottle is
discharged. The
message may take up
to 20 minutes before it
comes on, as the
cargo firex bottle
gradually discharges.
SMOKE
CARGO SQUIB 1 (2)
Advisory (green)
Comes on to indicate,
when the cargo firex
bottle test is performed,
that the elements on
the squibs are
operative.
Vol. 1 10--20--21
REV 56, Jan 31/03
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual
CSP A--013
MASTER
Cargo Compartment Firex Test
Figure 10---20---13
CARGO BOTTLE
Toggle Switch
(spring loaded to
center)
TEST 1 -- Simulates
a smoke condition
on detector 1.
The following come
on:
SMOKE CARGO
warning message
comes on,
CARGO SQUIB 1
advisory message
comes on (continuity
check of squib 1),
CARGO FIREX
panel:
NORMAL CARGO
SMOKE PUSH (red)
NORMAL BOTTLE
ARMED PUSH TO
DISCH (green), and
STANDBY CARGO
SMOKE PUSH
(green) lights
on.
TEST 2 -- Simulates
a smoke condition
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