CHAPTER
26
Fire Protection
CHAPTER 26 Fire Protection
26-CONTENTS
Page 7
D633W101-BEJ
Jan 05/2002
FIRE PROTECTION -INTRODUCTION
Purpose
The fire protection systems monitor the airplane for these conditions:
*
Fire
*
Smoke
*
Engine overheat
*
Pneumatic duct leak.
The fire protection systems also include fire extinguishers.
Fire/Overheat Detection
The airplane has these fire/overheat detection systems:
*
Engine fire detection
*
Lavatory smoke detection
*
APU fire detection
*
Lower cargo compartment smoke detection
*
Wheel well fire detection
*
Duct leak and overheat detection
*
Electrical and electronic (E/E) cooling smoke detection.
Extinguishing
The airplane has these fire extinguishing systems:
*
Engine fire extinguishing
*
Lavatory waste compartment fire extinguishing
*
APU fire extinguishing
*
Lower cargo fire extinguishing
EFFECTIVITY
BEJ ALL
* Portable fire extinguishers.
Abbreviations and Acronyms
*
ACIPS -airfoil and cowl ice protection system
*
ACMF -airplane conditioning monitoring function
*
ACMS -airplane conditioning monitoring system
*
AGS -air ground system
*
AIMS -airplane information management system
*
APU -auxiliary power unit
*
APUC -auxiliary power unit controller
*
ARINC -Aeronautical Radio, Inc.
*
ASCPC -air supply and cabin pressure controller
*
ASG -ARINC signal gateway
*
auto -automatic
*
BIT -built-in-test
*
BITE -built-in-test-equipment
*
btl -bottle
*
btls -bottles
*
CACP -cabin area control panel
*
cgo -cargo
*
ch -channel
*
CMCS -central maintenance computing system
*
CSS -cabin services system
*
CSCP -cabin system control panel
*
disch -discharge
*
DLODS -duct leak and overheat detection system
*
ECS -environmental control system
*
EDP -engine-driven pump
*
EEU -ELMS electronic unit
*
EICAS -engine indicating and crew alerting system
*
ELMS -electrical load monitoring system
*
ENG -engine
26-00-00
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FIRE PROTECTION -INTRODUCTION
*
equip -equipment
*
ext -external
*
ext -extinguishing
*
FCR -flight crew rest
*
fwd -forward
*
ind -indicator
*
kg -kilogram
*
LED -light emitting diode
*
LRU -line replaceable unit
*
MAT -maintenance access terminal
*
MD&T -master dim and test
*
MEC -main equipment center
*
MFD -multi-function display
*
MGMT -management
*
OEU -overhead electronics unit
*
OPAS -overhead panel ARINC 629 system * ovht -overheat * ovrd -override
*
press -pressure
*
PSEU -proximity switch electronics unit
*
pwr -power
*
rmt -remote
*
stby -standby
*
vlv -valve
*
WEU -warning electronic unit
*
WES -warning electronic system
*
WOW -weight-on-wheels
EFFECTIVITY BEJ ALL 26-00-00
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D633W101-BEJ Sep 05/2002
777 AIRCRAFT MAINTENANCE MANUAL
FIRE PROTECTION -INTRODUCTION
EFFECTIVITY BEJ ALL 26-00-00
Page 3
D633W101-BEJ Jan 05/2002
FIRE PROTECTION -SYSTEM TESTS
General
These are the system tests for the fire extinguishing system:
*
Cargo squibs
*
Engine and APU squibs.
Cargo Squibs
WARNING: KEEP PERSONS AWAY FROM THE CARGO COMPARTMENT DURING THIS TEST. IF A SQUIB FIRES ACCIDENTALLY, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS AND CAUSE INJURIES.
This test supplies a small current to these squibs:
*
Cargo compartment fire extinguishing bottles
*
Cargo compartment fire extinguishing flow valves
*
Engine fire extinguishing bottles
*
APU fire extinguishing bottle.
The test makes sure that there are no open circuits in the cargo compartment fire extinguishing squibs and their related wiring.
Engine and APU Squibs
WARNING: KEEP PERSONS AWAY FROM THE ENGINE AND APU DURING THIS TEST. IF A SQUIB FIRES ACCIDENTALLY, THE FIRE BOTTLE CAN RELEASE ITS CONTENTS AND CAUSE INJURIES.
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