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
Page 1 D633W101-BEJ Sep 05/2002

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 
Page 2 
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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