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REV 56, Jan 31/03
Vol. 1 10--20--10
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual MASTER
CSP A--013
ENGINE FIRE EXTINGUISHING
2 MASTER
WARNING
switchlight
is pressed
in.
-- Firebell is silenced.
-- MASTER WARNING
switchlight goes out and the
system is reset.
ON OUT OUT OUT
3 Left thrust
lever is set
to the
SHUTOFF
position.
-- LH ENG FIRE PUSH
switchlight remains on.
ON OUT OUT OUT
4 LH ENG
FIRE
PUSH
switchlight
is pressed
in.
-- BOTTLE 1 ARMED PUSH
TO DISCH switchlight comes
on.
-- BOTTLE 2 ARMED PUSH
TO DISCH switchlight comes
on.
-- Left squibs of bottles 1 and 2
are armed.
-- Left engine fuel SOV closes.
-- Left bleed air SOV closes.
-- Left hydraulic SOV closes.
-- Left IDG shuts down.
ON ON ON OUT
5 BOTTLE 1
ARMED
PUSH TO
DISCH
switchlight
is pressed
in.
-- Left squib on bottle 1 fires.
-- FIREX agent from bottle 1
discharges into left power
plant fire zone A. ON ON ON OUT
6 Bottle 1
fully
discharges
.
-- The pressure switch on
bottle 1 opens as pressure
drops below 225 to 275 psi.
-- ENG BTL 1 LO is displayed
on the EICAS.
ON OUT ON OUT
7 If fire
condition
in left
engine
persists.
-- LH ENG FIRE PUSH
switchlight remains on.
ON OUT ON OUT
Vol. 1 10--20--11
REV 56, Jan 31/03
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual
CSP A--013
MASTER
ENGINE FIRE EXTINGUISHING
8 BOTTLE 2
ARMED
PUSH TO
DISCH
switchlight
is pressed
in.
-- Left squib on bottle 2 fires.
-- FIREX agent from bottle 2
discharges into left engine
engine fire zone A. ON OUT ON OUT
9 Bottle 2
fully
discharges
.
-- The pressure switch on
bottle 2 opens as pressure
drops below 225 to 275 psi.
-- ENG BTL 2 LO is displayed
on EICAS.
OUT OUT OUT OUT
D. APU
The APU fire detection system is used to detect a fire or overheat condition in the APU
enclosure. The detection system consists of dual heat sensitive detection loops
arranged in parallel around the inside of the APU enclosure. Each loop is connected to
the control unit and is monitored continuously for fire or overheat conditions. In normal
operation, both detection loops must detect a fire or overheat condition before a fire
warning alarm is issued. If a short or open circuit fault is detected in one loop, the
control unit will automatically switch to single loop detection and the EICAS will display
an APU FIRE FAIL caution message on the primary page.
APU fire protection has two modes of operation:
S Ground Mode -- When a fire is detected, the control unit closes the fuel and bleed
air shutoff valves and the APU shuts down. Five seconds later the fire bottle
automatically discharges and the external horn sounds.
S Flight Mode -- When a fire is detected, the control unit closes the fuel and bleed air
shutoff valves and the APU shuts down, but the fire bottle must be discharged
manually using the APU BOTTLE ARMED PUSH TO DISCH switchlight on the
copilots glareshield.
REV 56, Jan 31/03
Vol. 1 10--20--12
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual MASTER
CSP A--013
APU Fire Detection System --- Schematic
Figure 10---20---6
PRIMARY PAGE
SENSOR
ELEMENTS
FIRE DETECTION/
/FIREX MONITOR PANEL
APU
ENCLOSURE
APU TOGGLE
SWITCH WARN/FAIL
TEST SWITCH
APU FIRE
PUSH
MASTER
CAUTION
MASTER
WARNING
MASTER
CAUTION
MASTER
WARNING
CO--PILOT’S
GLARESHIELD
PILOT’S
GLARESHIELD
CONTROL UNIT
XXXXXXX XXXXX
Vol. 1 10--20--13
REV 56, Jan 31/03
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX)
Flight Crew Operating Manual
CSP A--013
MASTER
Fire Detection and Extinguishing --- APU PushButtons
Figure 10---20---7
Right Glareshield
BOTTLE ARMED PUSH TO DISCH
Used to discharge the APU bottle.
BOTTLE ARMED PUSH TO DISCH
(green) light indicates that the bottle
squib is armed and the bottles
is charged.
APU FIRE PUSH
Used to arm the APU bottle squib.
Closes the APU bleed air load control
valve and turns off the APU fuel pump.
　
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