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Components and Operation........................................................................................ 9-15
Heat-Sensing Element .......................................................................................... 9-15
Overheat Detection Control Unit ........................................................................... 9-16
MLG BAY Overheat Test ...................................................................................... 9-16
Controls and Indicators ..................................................................................................... 9-17
General ....................................................................................................................... 9-17
Engine and APU Fire/Overheat Protection ................................................................. 9-17
Fire Detection and FIREX Monitor Test ...................................................................... 9-18
MLG Bay Overheat Test ............................................................................................. 9-18
Baggage Smoke Detector Test................................................................................... 9-19
EICAS Messages........................................................................................................ 9-20
List of Figures
Graphic Title Figure
For Training Purposes Only
May 03
9-iii
P I LOT T R A I N I N G GU I D E FIRE PROTECTION
Engine Fire Detection .........................................................................................................9-1
Jet Pipe / Pylon Overheat Sensing Element .......................................................................9-2
Engine and APU Fire Extinguishing System.......................................................................9-3
Glareshield Panels..............................................................................................................9-4
Miscellaneous Test Panel ...................................................................................................9-5
APU Fire Detection .............................................................................................................9-6
Copilot’s Glareshield Panel.................................................................................................9-7
Smoke Detector Test Button...............................................................................................9-8
Main Landing Gear Bay Overheat Heat-Sensing Element .................................................9-9
LDG GEAR CONTROL Panel........................................................................................... 9-10
Glareshield Panels............................................................................................................9-11
Miscellaneous Test Panel ................................................................................................. 9-12
Landing Gear Control Panel ............................................................................................. 9-13
Annunciator Panel.............................................................................................................9-14
9-iv For Training Purposes Only
May 03
FIRE PROTECTION P I LOT T R A I N I N G GU I D E
Page Intentionally Left Blank
FIRE PROTECTION
For Training Purposes Only
May 03
9-1
P I LOT T R A I N I N G GU I D E
CHAPTER 9: FIRE PROTECTION Introduction
The fire protection system is divided into two separate subsystems:
• Fire and overheat detection system
• Fire extinguishing system
The fire and overheat detection system includes components which detect fire,
overheat, or smoke conditions. Fire and overheat detection is provided in the
following areas:
• engines
• jet pipe and pylons
• APU
• main landing gear
Smoke detection is provided in the baggage compartment and the lavatory. Provisions
are also made for an optional galley overheat detection system.
The fire extinguishing system delivers an extinguishing agent to protected areas of the
aircraft; zone A of the engines and the APU enclosure.
The detection and extinguishing systems can be tested and monitored from the
cockpit.
Portable fire extinguishers are provided in the cockpit and cabin.
FIRE PROTECTION
9-2 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Engine Fire/Overheat Protection
Description
The engine fire and overheat protection system detects fire and/or overheat conditions
in the nacelle, jet pipe, and pylon areas of the engine. The engine fire and overheat
protection system is divided in two zones, Zone A and Zone B:
• Zone A includes the combustion area of the engine. Overheat/fire detection and
　
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