canadair regional jet 100/200 - fire protection test panel smoke detector lavatory ... canadair...

1. INTRODUCTION

The aircraft fire protection system consists of the following separate subsystems:

� Fire and overheat detection

� Fire extinguishing.

The fire protection system provides detection and extinguishing of a fire in the enginenacelles, the auxiliary power unit (APU) compartment and the cargo compartment. Anindependent system is provided for fire detection and extinguishing in the lavatory. Adetection system is also provided for the main landing gear wheel wells.

The fire protection system provides detection and extinguishing of a fire in the enginenacelles and the auxiliary power unit (APU) compartment. The main landing gear wheelwells are provided with fire detection only. An independent system is provided for firedetection and extinguishing in the lavatory. <0057>

Indications to alert the crew to fire, smoke and overheat conditions as well as fire protectionsystem health are provided by the EICAS displays and panel lights.

Canadair Regional Jet 100/200 - Fire Protection

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FIRE ANDOVERHEATCONTROL

UNIT

OVERHEATDETECTIONCONTROL

UNIT

RH ENGINE ANDJET PIPE DUALLOOP SENSING

ELEMENTS

FIRE DETECTION/FIREX MONITOR

PANEL

LH ENGFIRE PUSH

SWITCH/LIGHT

RH ENGFIRE PUSH

SWITCH/LIGHT

APUFIRE PUSH

SWITCH/LIGHT

RH MLGWHEEL WELL

SENSINGELEMENT

LH MLGWHEEL WELL

SENSINGELEMENT

DCU’S

MLG BAYOVHT TEST

PANEL

SMOKEDETECTOR

LAVATORY

APU DUALLOOP SENSING

ELEMENTS

LH ENGINE ANDJET PIPE DUALLOOP SENSING

ELEMENTS

NORMALCARGO SMOKE

PUSHSWITCH/LIGHT

STANDBYCARGO SMOKE

PUSHSWITCH/LIGHT

CARGO

COMPARTMENT

SMOKEDETECTOR

1

SMOKEDETECTOR

2

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1. FIRE DETECTION AND EXTINGUISHING

A. Engine

Each engine detection system is divided into two zones (A and B):

� Zone A covers the core section of the engine and is provided with fire detection andextinguishing

� Zone B covers the exhaust pipe and pylon area which contains the 10th and 14thstage bleed air ducting. No fire extinguishing protection is provided for this zone.

Engine fire detection is provided by dual heat sensitive detection loops (designatedloop A and B) arranged in parallel around the engine, exhaust pipe and pylon areas.Each loop is connected to the control unit and is monitored continuously for fire oroverheat conditions. In normal operation, both detection loops must detect a fire oroverheat condition before a fire warning is generated.

Control unit loop detection is controlled through LH/RH, ENG and JET switches on theFIRE DETECTION panel. The switch is used to select A, BOTH or B loop detection.

If one loop detects a fire, when both loops are selected, this is considered a False Fireand a L/R FIRE FAIL caution message will be displayed on the EICAS primary page.

During normal operations with both loops selected, the tables in this section lists theindications that are displayed if a fire, failure, or power loss is detected:


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DCU’S

LHS ENGINE RHS ENGINE

ENGINE LOOPS ENGINE LOOPS

CONTROL UNIT

FIXED CORECOWL LOOPS

PYLON LOOPS

JETPIPE LOOPS

MASTER WARNINGSWITCH/LIGHT

MASTER CAUTIONSWITCH/LIGHT

ENGINE FIREPUSH SWITCH/LIGHT

MASTER CAUTIONSWITCH/LIGHT

MASTER WARNINGSWITCH/LIGHT

CO--PILOT’SGLARESHIELD

EICASPRIMARYPAGE

PILOT’SGLARESHIELD


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ENGINE BOTTLE 1, 2 ToggleSwitches (spring loaded toNORM)

TEST -- Applicable Firexbottle squib circuitcontinuity are checked.

L/R ENG SQUIB 1 (2)advisory (green) messagedisplayed if testsuccessful.

NORM -- Selects normaloperation.

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LH (RH) ENG FIREPUSH, BOTTLE 1and 2 ARMEDPUSH TO DISCHswitch/lights comeon.

TEST Toggle Switch(spring loaded tocenter)

WARN -- Simulatesa fire or overheatcondition on theengineswith the followingindications:

Firebell rings,

L (R) ENG FIRE, andL (R) JETPIPEOVHT warningmessages come on,

HYD SOV 1 (2)OPEN, L (R) ENGSOV OPEN,caution messagescome on,

L (R) FIRE FAIL,APU FIRE FAIL,and L (R) JETOVHT FAIL cautionmessages come on.

”JETPIPEOVERHEAT”aural warningcomes on,

FAIL -- Simulates ashort on the selectedloops (A or B) withthe followingindications:

JET LH, RH ToggleSwitchesSelects jetpipe andpylon overheatdetection loop A, loopB or both (for normaloperation).ENG LH, RH Toggle

SwitchesSelects engine firedetection loop A, loopB or both (for normaloperation).


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Fuel feed SOVcloses.

Bleed air SOVcloses.

Hydraulic SOVcloses.

Engine--drivengenerator shutsdown.

During FIRE WARNTEST:Comes on (red) duringtest of respectiveengine fire detectorloop.

BOTTLE 1/2 ARMEDPUSH TO DISCHSwitch/LightsComes on (green) toindicate that:

Applicable firexbottle squibarmed.

Pressed in --Fires squib todischarge applicableengine bottle.

Pilot’s Glareshield Panel Copilot’s Glareshield Panel

During FIRE WARNTEST:

Applicable squibconfirmedoperational.

LH/RH ENG FIREPUSH Switch/Light(guarded)Comes on (red) whenfire is detected inrespective engine.

L ENG FIRE

R ENG FIRE

Primary Page

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L/R ENG FIREWarning (red)Comes on to indicatethat a fire exists in therespective engine.

-- Firebell --

Pressed in -- Affected:Squibs on both firexbottles are armed.

Pressed out --Affected:

Squibs of both firexbottles are disarmed.

Fuel feed SOV

Bleed air SOV opensHydraulic SOV opensEngine--drivengenerator becomesavailable.

open...


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Status Page

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Primary Page

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R ENG FIRE

L ENG FIRE

L JETPIPE OVHT

L ENG SQUIB 1

R ENG SQUIB 1

L, R ENG SQUIB 1 Advisory message(green)Comes on to indicate that the respectivesquib of firex bottle 1 is operative.

L, R ENG SQUIB 2 Advisory message(green)Comes on to indicate that the respectivesquib of firex bottle 2 is operative.

Comes on to indicate that an overheatcondition exists in the respectiveengine jetpipe/engine pylon.

Comes on to indicate that a failureexists in the respective engine firesensing loops (A & B).

Comes on to indicate that a failureexists in the respective jetpipeoverheat sensing loops (A & B).

Comes on to indicate that therespective firex bottle is discharged.

L ENG SQUIB 2

R ENG SQUIB 2

R JETPIPE OVHT

R FIRE FAIL

L FIRE FAIL

L JET OVHT FAILR JET OVHT FAIL

ENG BTL 2 LO

ENG BTL 1 LO

Comes on to indicatethat a fire exists in therespective engine.

-- Firebell --

JETPIPE OVERHEAT

L, R JETPIPE OVHT Warning (red)

L, R FIRE FAIL Caution (amber)

L, R JET OVHT FAIL Caution(amber)

ENG BTL 1, 2 LO Caution (amber)

L/R ENG FIRE Warning (red)


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FIRE

LH ENG

PUSH

BOTTLE 1

ARMED

PUSH TO

DISCH

BOTTLE 2

ARMED

PUSH TO

DISCH

FIRE

RH ENG

PUSH

AFT EQUIPMENT BAY

ZONE A ZONE A

RH ENGINELH ENGINE

EICAS FIREWARNING LOGIC

TOEICASVISUAL

NO. 2ENGINEFIREXBOTTLE

NO. 1ENGINEFIREXBOTTLE

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B. ��

When the control unit detects a failure in one loop, due to a short or power loss, there isno indication of the failure until the WARN test is performed. The control unit willautomatically switch to single loop detection. Single loop operation can also beselected by placing the defective loop switch on the FIRE DETECTION panel fromBOTH to the good loop (A or B). During normal operations with one loop selected, thefollowing table lists the indications that are displayed if a fire, failure, or power loss isdetected:

LOOP CONDITION (Dual Loops) INDICATIONS

LOOP A LOOP B FAIL MESSAGE(Caution)

FIRE WARNINGS

Normal Normal

Detecting Fire Detecting Fire ON

Short or PowerFailure


ON

Normal Detecting False Fire ON

Normal Short or PowerFailure

Detecting Fire Short or PowerFailure

ON

Detecting False Fire Normal ON

Open Normal


Open

Open Open

Open detecting fire Detecting Fire ON

NOTE: 1. Normal, means a serviceable loop with no fire or shortdetected.

2. False Fire, means one loop detects a fire and the other loop isnormal.

3. When a jet pipe overheat is detected, the ENG FIRE switchlightdoes not illuminate with the EICAS and aural warnings.


LOOP CONDITION(single loop)

INDICATIONS

LOOP A or LOOP B FAIL MESSAGE FIRE WARNINGS

Normal

Detecting Fire ON

Short or Power Failure ON

Open

Open with fire ON

C. � ��

The control unit provides a means of testing the detection system by selectivelysimulating fire/overheat and fail conditions on the selected loops (A or B). The followingtable lists the possible loop conditions when the WARN test is performed:

LOOP CONDITION(Both Loops selected)

INDICATIONS

LOOP A LOOP B FAIL MESSAGE(Caution)

FIRE WARNINGS

Normal Normal ON

Open loop Open loop



ON

Normal Open loop

Normal Short or PowerFailure

ON ON


Open loop ON

Open loop Normal


Normal ON ON

Open loop Short or PowerFailure

ON


LOOP CONDITION(Single loop selected)

INDICATIONS

LOOP A or LOOP B FAIL MESSAGE FIRE WARNINGS

Normal ON

Detecting Fire ON

Open loop

Short or Power Failure ON

The following table lists the possible loop conditions when the fail test is performed:

LOOP A LOOP B FAIL MESSAGE (Caution)

Normal Normal ON

LOOP A or LOOP B (Single Loop) FAIL MESSAGE (Caution)

Loop A Selected ON

Loop B Selected ON

The engine fire extinguishing system provides a means to extinguish fires in the left andright engines. The system consists of two FIREX bottles, located in the aft equipmentcompartment, a low pressure switch, a bottle pressure gauge and discharge lines. Thebottles contain Halon and are pressurized to 600 psi. Each bottle has two firingcartridges (squibs) to permit discharge of the fire extinguishing agent into either enginenacelle. The pressure switches are connected to the FIDEEX, and if the bottlepressure decrease to a preset point, an ENG BTL 1 (2) LO caution message will bedisplayed on the EICAS primary page.

ENGINE FIRE EXTINGUISHING

EVENT

(Left enginefire

GLARESHIELD INDICATIONS

fireprocedure isdescribed,the right

engine fireprocedure is

similar)

RESULT LHENGFIREPUSH

BOTTLE 1ARMED

PUSH TODISCH

BOTTLE 2ARMED

PUSH TODISCH

MASTERWARNING

1 Fire condi-tion occursin the leftengine firezone.

-- Firebell sounds.

-- MASTER WARNING and LHFIRE PUSH switchlightscome on.

ON OUT OUT ON



2 MASTERWARNINGswitchlightis pressedin.

-- Firebell is silenced.

-- MASTER WARNINGswitchlight goes out and thesystem is reset.

ON OUT OUT OUT

3 Left thrustlever is setto theSHUTOFFposition.

-- LH ENG FIRE PUSHswitchlight remains on.

ON OUT OUT OUT

4 LH ENGFIREPUSHswitchlightis pressedin.

-- BOTTLE 1 ARMED PUSHTO DISCH switchlight com-es on.

-- BOTTLE 2 ARMED PUSHTO DISCH switchlight com-es on.

-- Left squibs of bottles 1 and 2are 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 1ARMEDPUSH TODISCHswitchlightis pressedin.

-- Left squib on bottle 1 fires.

-- FIREX agent from bottle 1discharges into left powerplant fire zone A. ON ON ON OUT

6 Bottle 1fullydischarges.

-- The pressure switch onbottle 1 opens as pressuredrops below 225 to 275 psi.

-- ENG BTL 1 LO is displayedon the EICAS.

ON OUT ON OUT

7 If fireconditionin leftenginepersists.

-- LH ENG FIRE PUSHswitchlight remains on.

ON OUT ON OUT



8 BOTTLE 2ARMEDPUSH TODISCHswitchlightis pressedin.

-- Left squib on bottle 2 fires.

-- FIREX agent from bottle 2discharges into left engineengine fire zone A. ON OUT ON OUT

9 Bottle 2fullydischarges.

-- The pressure switch onbottle 2 opens as pressuredrops below 225 to 275 psi.

-- ENG BTL 2 LO is displayedon EICAS.

OUT OUT OUT OUT

D. APU

The APU fire detection system is used to detect a fire or overheat condition in the APUenclosure. The detection system consists of dual heat sensitive detection loopsarranged in parallel around the inside of the APU enclosure. Each loop is connected tothe control unit and is monitored continuously for fire or overheat conditions. In normaloperation, both detection loops must detect a fire or overheat condition before a firewarning alarm is issued. If a short or open circuit fault is detected in one loop, thecontrol unit will automatically switch to single loop detection and the EICAS will displayan APU FIRE FAIL caution message on the primary page.

APU fire protection has two modes of operation:

� Ground Mode -- When a fire is detected, the control unit closes the fuel and bleedair shutoff valves and the APU shuts down. Five seconds later the fire bottleautomatically discharges and the external horn sounds.

� Flight Mode -- When a fire is detected, the control unit closes the fuel and bleed airshutoff valves and the APU shuts down, but the fire bottle must be dischargedmanually using the APU BOTTLE ARMED PUSH TO DISCH switchlight on thecopilots glareshield.


( ) �� *

PRIMARY PAGE

SENSORELEMENTS

FIRE DETECTION//FIREX MONITOR PANEL

APUENCLOSURE

APU TOGGLESWITCH WARN/FAIL

TEST SWITCH

APU FIREPUSH

MASTERCAUTION

MASTERWARNING

MASTERCAUTION

MASTERWARNING

CO--PILOT’SGLARESHIELD

PILOT’SGLARESHIELD

CONTROL UNIT

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Right Glareshield

BOTTLE ARMED PUSH TO DISCHUsed to discharge the APU bottle.

BOTTLE ARMED PUSH TO DISCH(green) light indicates that the bottlesquib is armed and the bottlesis charged.

APU FIRE PUSHUsed to arm the APU bottle squib.Closes the APU bleed air load controlvalve and turns off the APU fuel pump.APU FIRE PUSH (red) lightindicates that a fire is detectedin the APU enclosure.

BOTTLEARMED

PUSH TODISCH


APU Fire Extinguishing SystemFigure 10--20--8

APU ENCLOSURE

NOZZLEASSEMBLY

CARTRIDGE

APU FIREEXTINGUISHER

CONTAINER

FILL AND

THERMAL DISCHARGE LINE

FIREX MONITOR

APU BOTTLETEST

DCU

FIREDETECTIONCONTROL

UNIT

5 SECDELAYRELAY

WEIGHT ONWHEELSRELAY

SAFETY FITTING

PANEL

TUBE AND

APUFIREHORN

APUFIRELOOPS


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Status Page

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Primary Page

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APU FIRE FAIL

APU FIRE

APU BTL LO

APU SQUIB 1

APU SQUIB 2

--Firebell--Exterior Horn(Sounds on groundand system willautomaticallydischarge after 5seconds).

APU SQUIB 1, 2 Advisory message(green)Comes on to indicate that the respectiveelement on the squib is operative.

APU FIRE FAIL Caution (amber)Comes on to indicate that a failureexists in the APU fire sensing loops(A&B).

APU BTL LO Caution (amber)Comes on to indicate that the APUfirex bottle discharged.

APU FIRE Warning (red)Comes on to indicatethat a fire exists in theAPU.


APU FIRE EXTINGUISHING

GLARESHIELD INDICATIONS

EVENT RESULT APU FIREPUSH

BOTTLEARMED

PUSH TODISCH

MASTERWARN-

ING

1 Fire condition occurs inAPU fire zone.

-- Firebell sounds.

-- MASTER WARNING and APUFIRE PUSH lights come on.

-- APU shuts down automatically.

If the aircraft is on the ground:

-- The APU bottle automaticallydischarges after 5 seconds.

ON OUT ON

2 MASTER WARNING ispressed in.

-- Firebell is silenced.

-- MASTER WARNING light goesout and system is reset.

ON OUT OUT

3 APU FIRE PUSHswitchlight is pressed in.

-- BOTTLE ARMED PUSH TODISCH light comes on.

-- If airborne, the APU fire shutoffrelay is energized to shut downthe APU.

-- APU squibs are armed.

-- APU fuel SOV closes.

-- APU bleed air LCV closes.

ON ON OUT

4 BOTTLE ARMED PUSHTO DISCH is pressed in.

-- APU squib fires.

-- FIREX agent discharges intothe APU enclosure.

ON ON OUT

5 APU bottle fullydischarges.

-- Pressure switch on bottleopens as pressure drops below225 to 275 psi.

-- APU BTL LO is displayed onEICAS.

OUT OUT OUT

E. Cargo Compartment

The cargo smoke detection system consists of two optical type smoke detectors(NORMAL and STANDBY) located in the ceiling of the cargo compartment. Bothsmoke detectors are protected from damage by a steel cage. Each detector is capableof producing an alarm signal within an established time frame and smoke concentrationlevel. The detectors are positioned to avoid false alarms with overlapping coverage toguard against the failure of one detector. When smoke is detected by one or bothdetectors, air flow into and out of the cargo compartment is shut off to isolate thecompartment. A SMOKE CARGO warning message is displayed on the EICAS primarypage, a SMOKE aural warning is generated and both CARGO SMOKE PUSH(cover--guarded) switchlights illuminate on the CARGO FIREX panel.


NOTE

Operation of mobile transceivers in close proximity tothe smoke detectors or exhaust fumes from groundhandling equipment may cause a false alarm.

Fire extinguishing for the cargo compartment is provided by two FIREX bottles, a highrate discharge bottle and a low rate discharge bottle. Both bottles are located in the aftequipment compartment, and are pressurized with extinguishing agent (Halon). Eachbottle has a firing cartridge with two squibs, used to discharge the Halon into the cargocompartment. Each bottle has a low pressure switch and a pressure gauge. Wheneither BOTTLE ARMED PUSH TO DISCHARGE DISCH switchlight is pushed, bothbottles will discharge simultaneously. The high rate discharge bottle is designed toquickly deliver extinguishing agent into the cargo compartment for initial firesuppression. The low rate discharge bottle discharges slowly, maintaining a flow ofextinguishing agent into the cargo compartment (over a 30 minute period) to preventre-ignition and allow for aircraft diversion. If either bottle pressure decrease to a presetpoint, the pressure switch opens, and a CARGO BTL LO caution message will bedisplayed on the EICAS primary page.


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NORMAL (STANDBY)CARGO SMOKE(coverguard)PUSH Switch/LightsCome on (red) whena smoke condition isdetected in the cargocompartment.

Pressed in --Respective squib ofcargo compartmentfirex bottle is armed.Pressed out --Respective squib ofcargo compartmentfirex bottle isdisarmed.

NORMAL (STANDBY),BOTTLE ARMED PUSH TO DISCH Switch/LightsCome on (green) when the respective CARGO SMOKE PUSH switch/lightis pressed in, to indicate that the cargo compartment firex bottle is chargedand the respective squib is armed.Pressed in --Squibs in both bottles fire.

NOTEBOTTLE ARMED -- PUSH TO DISCHGreen light goes out once the firexbottle is discharged (goes out whenCARGO BTL LO caution messagecomes on).

CARGOARMED

CARGO FIREX

STANDBYNORMAL

SMOKE

PUSH

BOTTLE

PUSH TODISCH

CARGOARMED

SMOKE

PUSH

BOTTLE

PUSH TODISCH


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WITHINA BOTTLE

CARGOSMOKEPUSH

BOTTLEARMED

PUSH TODISCH

CARGOSMOKEPUSH

BOTTLEARMED

PUSH TODISCH

NORMAL STANDBY

TO EICASTO DISCHARGENOZZLE

SMOKE DETECTOR 1

ALARM OUTPUT

TEST INPUT

SQUIB 1

SQUIB 2

LOWPRESSURESWITCH

BOTTLE #1

TOEICAS

BOTTLE #2

PRESSUREGAUGE

TOEICAS

BOTTLE

RUPTUREDISC

METERINGORIFICE

METERINGORIFICE

SQUIB 2

TOEICAS

SMOKE DETECTOR 2

ALARM OUTPUT

TEST INPUT


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Status Page

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Primary Page

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CARGO BTL LO

SMOKE CARGO

CARGO SQUIB 1

CARGO SQUIB 2

SMOKE CARGOWarning (red)Comes on to indicatethat a smoke conditionexists in the cargocompartment.

CARGO BTL LOCaution (amber)Comes on to indicatethat the cargocompartment bottle isdischarged. Themessage may take upto 20 minutes before itcomes on, as thecargo firex bottlegradually discharges.

SMOKE

CARGO SQUIB 1 (2)Advisory (green)Comes on to indicate,when the cargo firexbottle test is performed,that the elements onthe squibs areoperative.


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CARGO BOTTLEToggle Switch(spring loaded tocenter)

TEST 1 -- Simulatesa smoke conditionon detector 1.

The following comeon:

SMOKE CARGOwarning messagecomes on,

CARGO SQUIB 1advisory messagecomes on (continuitycheck of squib 1),

CARGO FIREXpanel:NORMAL CARGOSMOKE PUSH (red)

NORMAL BOTTLEARMED PUSH TODISCH (green), and

STANDBY CARGOSMOKE PUSH(green) lightson.

TEST 2 -- Simulatesa smoke conditionon detector 2.

The following comeon:

SMOKE CARGOwarning messagecomes on,

CARGO SQUIB 2advisory messagecomes on (continuitycheck of squib 2),

CARGO FIREXpanel:NORMAL CARGOSMOKE PUSH, (red)

STANDBY CARGOSMOKE PUSH (red),and

STANDBY BOTTLEARMED PUSH TODISCH (green) lightson.

NORMAL --Selected fornormal operation.

NOTEIf a CARGO BOTTLEtest is conducted withthe CARGO switchselected to FAN orCOND AIR, a CARGOFAN FAIL statusmessage will come on.

Fire Detection/Firex Monitor Panel


F. Testing

Testing is initiated using the TEST 1 / NORM / TEST 2 switch located on the FIREDETECTION/ FIREX Monitor Panel. TEST 1 tests the NORMAL smoke detector andthe bottle 1 squibs. TEST 2 tests the STANDBY smoke detector and the bottle 2squibs. Test results are displayed on the EICAS.

CARGO COMPARTMENT FIRE EXTINGUISHING

INDICATIONS

EVENTRESULT CARGO

SMOKEPUSH

BOTTLEARMED

PUSH TODISCH

MASTERWARN-

ING

1 Smoke condition occursin the cargocompartment.

-- “Smoke” aural warning is an-nunciated.

-- MASTER WARNING andSMOKE CARGO warningmessages comes on.

-- SMOKE CARGO PUSHswitchlights come on.

ON OUT ON

2 MASTER WARNINGswitchlight is pressed in.

-- “Smoke” aural warning issilenced.

-- MASTER WARNING light goesout and the system is reset.

ON OUT OUT

3 SMOKE CARGO PUSHis pressed in.

-- BOTTLE ARMED PUSH TODISCH light comes on.

-- Cargo bottle squibs are armed.

ON ON OUT

4 BOTTLE ARMED PUSHTO DISCH is pressed in.

-- Squibs of both bottles fire.

-- Extinguishing agent dischargesinto the cargo compartment.

ON ON OUT

5 One bottle fullydischarges.

-- Pressure switch on one bottleopens as pressure drops belowset level.

-- CARGO BTL LO cautionmessage is displayed on theEICAS primary page.

-- Remaining bottle continues todischarge for a minimum of 30minutes.

OUT OUT OUT


G. System Circuit Breakers

SYSTEM SUB--SYSTEM CB NAME BUS BAR CBPANEL

CBLOCATION

NOTES

FIRE DETLOOP A

N1

Fire Detectorloops

FIRE DETLOOP B

DC BATT N2p

FIRE DETTEST

N3

FIRE EXT 1 RENG

R1

Fire Engine Bottles

FIRE EXT 1 LENG

R2

FireProtectionSystems

Engine BottlesFIRE EXT 2 RENG

DC EMER

1 R3Systems

FIRE EXT 2 LENG

DC EMERR4

APU Bottle

APU FIRE EXTA

R5

APU BottleAPU FIRE EXTB

R6

Cargo Smoke

CARGOFIREX 1

DC BATTBUS

P1Cargo SmokeDetection CARGO

FIREX 2DC BUS 1 G1


1. LAVATORY FIRE PROTECTION

Lavatory fire detection and protection consists of a ceiling mounted smoke detector and awaste compartment fire extinguisher.

A. Detection

The smoke detector monitors the lavatory for the presence of smoke. When the smokedensity exceeds a preset level, the detector sounds an aural alarm and a SMOKETOILET caution message is displayed on the EICAS primary page.

The smoke detector monitors the lavatory for the presence of smoke. When the smokedensity exceeds a preset level, the detector sounds an aural alarm and a SMOKETOILET warning message is displayed on the EICAS primary page. <0037>

The smoke detector can be tested by pressing the test button on the detector. Duringthe test, an aural alarm sounds in the lavatory, the red alarm light on the detectorcomes on and a SMOKE TOILET caution message is displayed on the EICAS primarypage. The system is reset by pressing the interrupt button on the detector.

The smoke detector can be tested by pressing the test button on the detector. Duringthe test, an aural alarm sounds in the lavatory, the red alarm light on the detectorcomes on and a SMOKE TOILET warning message is displayed on the EICAS primarypage. The system is reset by pressing the interrupt button on the detector. <0037>

NOTE

Operation of mobile transceivers in close proximity tothe smoke detectors or exhaust fumes from groundequipment may cause a false alarm.


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Smoke DetectorLavatory Ceiling

700 and 2000 Hz tone

Test PushbuttonUsed to test smoke detector.When pressed in:

Aural alarm comes on.Alarm light comes on.EICAS warning messageis displayed.

Interrupt PushbuttonUsed to reset smoke detector.

Alarm Light (red)Comes on with theaural alarm to indicatethat a smoke conditionexists in the lavatory.

Power Light (green)Comes on to indicatethat the unit is powered.

SMOKE TOILET

Primary Page

<0039>

<0006>

SMOKE TOILETCaution (amber)Comes on with theaural alarm to indicatethat a smoke conditionexists in the lavatory.

SMOKE TOILET <0037>

Warning (red)Comes on with theaural alarm to indicatethat a smoke conditionexists in the lavatory.


B. Extinguishing

Fire extinguishing in the lavatory waste paper towel container is initiated automatically.The system consists of a disposable Halon fire extinguisher bottle with dual dischargenozzles. The bottle is mounted near the waste container with the nozzles extendinginto the waste container. The end of each discharge nozzle is sealed with a heatsensitive capsule which, when subjected to heat, melts to release the extinguishingagent into the waste container. A temperature indicating strip sensor is located on theinside of the waste compartment door. The sensor is used to provide an indication thathigh temperature has been sensed in the compartment and that the bottle may havedischarged.

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WASTE COMPARTMENTFIRE EXTINGUISHER

C. System Circuit Breakers


CBLOCATION

NOTES

LavatorySmokeDetection

SMOKE DET DC BUS 1 1 K1


1. MAIN LANDING GEAR OVERHEAT DETECTION

The main landing gear overheat detection system provides indication of an overheatcondition in the main landing gear wheel well bins. An overheat contion can be caused byoverheated brakes or brake fires. The system consists of two overheat detection sensorloops and an overheat detection unit.

The sensor loops are installed around the top inner surface of each main wheel well bin andare connected to the detection unit which is installed in the forward avionics compartment.

The overheat detection unit continuously monitors the loops for overtemperature conditionsand system faults (short circuits). If an overheat condition is detected by the unit, in eitherwheel well bin, a signal is sent to the EICAS to display a MLG BAY OVHT warning messageon the primary page. If a system fault is detected by the unit, a signal is sent to the EICASto display a MLG OVHT FAIL caution message on the primary page.

The warning of an overheat condition, alerts the pilot to immediately lower the landing gearto reduce the landing gear temperature. The warning message will persist until thetemperature in the wheel well bin returns to normal limits.

The main landing gear overheat detection system may be tested, from the landing gearcontrol panel, by simulating an overheat condition or a system fault condition. The EICASwill display the applicable warning or caution message during the test.


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Primary Page

<0039>

<0006>

MLG OVHT FAIL

MLG BAY OVHT

MLG OVHT FAIL Caution (amber)Indicates that a fault exists in the main landinggear bay overheat detection system.

MLG BAY OVHT Warning (red)Indicates that an overheat condition exists inone or both of the main landing gear bays.

GEAR BAY OVERHEAT

MAIN WHEEL WELL

SENSOR LOOPS


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OVERHEATDETECTOR

SHORTCIRCUIT

DETECTOR

10 msDELAY

CB2--N9

28 VDCBATTERY BUSMLG BAY OVHTDETECTION

OVERHEAT DETECTION UNIT

OVHT

MLG BAYOVHT TESTPANEL

WARNFAIL

DCU’S

EICAS DISPLAY

MLG BAY OVHT (RED)

MLG BAY FAIL (AMBER)

GEAR BAY OVERHEAT

RIGHT TEMPSENSOR

LEFT TEMPSENSOR

OVERHEATTESTRESISTOR

INHIBIT

BTMS OVHTWARN RESETMAIN LANDING GEAR

BAY OVERHEAT TESTSwitch(Spring--loaded tonormal position)

OVHT--Simulatesan overheat conditionin the main landinggear bay.An aural and visualmessage isannunciated on EICAS.

MAIN LANDING GEARBAY OVERHEATWARNING FAIL TESTSwitch(Spring--loaded tonormal position)

WARN FAIL--Simulates a failure inthe main landing gearbay overheat detectionsystem.Message isannunciated on EICAS.

HORN

OFF

ARMED

ANTI SKID

OVHT TESTWARN FAIL

MLG BAYOVHT

MUTED

TEST

Landing Gear Control PanelCenter Instrument Panel


A. System Circuit Breakers


CBLOCATION

NOTES

Main LandingGear

OverheatDetection

MLG BAYOVHT DET

DC BATT 2 N9


canadair regional jet 100/200 - fire protection test panel smoke detector lavatory ... canadair...

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