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the forward and aft cargo compartments. An independent system is provided for fire
detection and protection in the lavatories. A detection system is also provided for the main
landing gear wheel wells.
Indications to alert the crew to fire, smoke and overheat conditions as well as fire protection
system health are provided by the EICAS displays and panel lights.
Vol. 1 10--10--2
FIRE PROTECTION
Introduction Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
FIDEEX System Block Diagram
Figure 10---10---1
LAMP
DRIVER
UNIT
FIDEEX
CONTROL
UNIT
BOTTLE
ARMED
PUSH TO
DISCH
APU
FIRE
PUSH
BOTTLE 1
ARMED
PUSH TO
DISCH
BOTTLE 2
ARMED
PUSH TO
DISCH
LH ENG
FIRE
PUSH
RH ENG
FIRE
PUSH
LEFT MLG
DETECTION LOOP
RIGHT MLG
DETECTION LOOP
AFT CARGO
SMOKE DETECTOR #2
AFT CARGO
SMOKE DETECTOR #1
FORWARD CARGO
SMOKE DETECTOR #3
FORWARD CARGO
SMOKE DETECTOR #2
FORWARD CARGO
SMOKE DETECTOR #1
APU
DETECTION LOOPS
LEFT ENGINE
DETECTION LOOPS
RIGHT ENGINE
DETECTION LOOPS
ENGINE FIREX
BOTTLE 2
ENGINE FIREX
BOTTLE 1
APU FIREX
BOTTLE
CARGO HRD
FIREX BOTTLE
CARGO LRD
FIREX BOTTLE
OVERHEAT
DETECTION
UNIT
LAVATORY
SMOKE DETECTOR
LAVATORY WASTE
FIRE EXTINGUISHER
DCU
CARGO FIREX
FWD
AFT
CARGO
SMOKE
PUSH
BOTTLE
ARMED
PUSH TO
DISCH
CARGO
SMOKE
PUSH
IDG 1 DISC
IDG 2 DISC
Vol. 1 10--20--1
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX) REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. FIRE DETECTION AND EXTINGUISHING (FIDEEX)
The fire detection and extinguishing system (FIDEEX) interfaces with the engines, APU and
cargo compartment fire protection systems. The FIDEEX uses the interfacing to provide fire
detection, smoke detection, fire extinguishing and system indication. The L/R ENG FIRE
PUSH and the 1/2 BOTTLE ARMED PUSH TO DISCH switchlights on the glareshield are
used by the crew to supply control inputs to the FIDEEX system.
A. Engine
Detection
Engine fire detection is provided by dual heat sensitive detection loops arranged in
parallel around the engine combustion section and exhaust pipe. Each loop is
connected to the FIDEEX 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 FIDEEX control unit will automatically switch to single loop detection and
signal the EICAS to display a L/R FIRE FAIL caution message on the EICAS primary
page.
Vol. 1 10--20--2
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX) REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Engine Fire Detection --- Block Schematic
Figure 10---20---1
ELEMENT 1 ELEMENT 2 ELEMENT 3 ELEMENT 4
LOOP B
RIGHT ENGINE
ELEMENT 1 ELEMENT 2 ELEMENT 3 ELEMENT 4
LOOPA
ELEMENT 1 ELEMENT 2 ELEMENT 3 ELEMENT 4
LOOP B
LEFT ENGINE
ELEMENT 1 ELEMENT 2 ELEMENT 3 ELEMENT 4
LOOPA
PILOT--
INITIATED
TEST
COPILOT
PILOT
GLARESHIELD
FIREBELL
CHIME
CHIME
CHIME
DCU LH ENG
FIRE
PUSH
RH ENG
FIRE
PUSH
FIRE
FAIL
FIRE
WARN
TEST
FIRE DETECTION/
FIREX MONITOR PANEL
CHANNEL A
DETECTION
LOGIC
LOOP
A
LOOP
B
CHANNEL B
DETECTION
LOGIC
LOOP
A
LOOP
B
FIRE
DET B
FIRE
DET A
CB1--N2
CB1--N1
28 VDC BATT BUS
CBP--1
FIDEEX CONTROL UNIT
FIRE SYS FAULT
(STATUS)
L/R ENG FIRE
(WARNING MSG)
L (R) FIRE FAIL
(CAUTION)
FIRE SYS OK
(ADVISORY)
EICAS DISPLAY
Vol. 1 10--20--3
FIRE PROTECTION
Fire Detection and Extinguishing (FIDEEX) REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Extinguishing
The engine fire extinguishing system provides a means to extinguish fires in the left and
right engines. The system consists of two FIREX bottles, located in the aft equipment
compartment, a low pressure switch, a bottle pressure gauge and discharge lines. The
bottles contain Halon and are pressurized to 600 psi. Each bottle has two firing
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