Fire Protection

Question 1

The Door 3 Upper Crew Rest Compartment is equipped with

Answer 1

a smoke detection system but no fire extinguishing system.

Question 2

The Lower Crew Rest Compartment (LCRC) is equipped with

Answer 2

a fire detection system and a fire extinguishing system.

Question 3

the engines also have

Answer 3

fire detection and extinguishing

and

overheat detection systems.

Question 4

The main gear wheel wells are only equipped with

Answer 4

a fire detection system.

Question 5

Each engine nacelle is equipped with two fire detector loops. Each loop provides

Answer 5

both fire and overheat detection.

Question 6

In normal operations an engine fire warning or overheat caution will be displayed when

Answer 6

both loops detect a fire or overheat condition.

Question 7

If a fault is detected in one loop, the system automatically switches to

Answer 7

single loop operation.

Fire and overheat detection is now provided in this new single loop operation.

Question 8

No fire or overheat detection will be provided should

Answer 8

both loops in an engine nacelle experience faults.

In this case, the EICAS advisory message DET FIRE ENG (L or R) will be displayed.

Question 9

In the event of an engine fire, the indications will be:

Answer 9

the fire bell sounds, the master WARNING lights illuminate,

the EICAS warning message FIRE ENG (L or R) is displayed,

the engine fire switch LEFT or RIGHT fire warning light illuminates,

the engine fire switch unlocks

and the engine FUEL CONTROL (L or R) switch fire warning light illuminates.

Question 10

In the event of an engine overheat, the indications will be:

Answer 10

the caution beeper sounds,

the master CAUTION lights illuminate

and the EICAS caution message OVERHEAT ENG (L or R) will be displayed.

Question 11

There are two engine fire extinguisher bottles. Either or both bottles can be discharged

Answer 11

into either engine.

Question 12

The APU fire detection system consists of dual fire detector loops. There is no

In normal operations

Answer 12

APU overheat detection.

Both loops must detect a fire to produce a warning.

Question 13

In the event of an APU Fire Warning

Answer 13

The APU will automatically be shut down.

Question 14

If a fault is detected in one APU detector loop the system

Answer 14

automatically configures for single loop configuration.

Question 15

In the event of APU fire detection system failure, the EICAS advisory message

Answer 15

DET FIRE APU will be displayed.

Question 16

In the event of an APU fire warning:

Answer 16

the fire bell will sound, the master WARNING lights will illuminate,

the EICAS warning message FIRE APU will be displayed,

the APU fire switch warning light will illuminate

and the APU fire switch will unlock.

Question 17

There is one APU fire extinguisher bottle.

Answer 17

rotating the switch in either direction will discharge the extinguisher bottle into the APU compartment.

The APU BTL DISCH light will illuminate

and the EICAS message BOTTLE DISCH APU will be displayed if the APU bottle has been discharged

or has low pressure.

Question 18

On the ground with both engines off an APU fire signal from either APU fire detector loop causes

Answer 18

APU shutdown and extinguisher bottle discharge.

Question 19

The main wheel well has fire detection only.

Answer 19

There is no fire extinguishing system.

The nose wheel well does not have a fire detection system.

The main wheel well fire detection system consists of dual fire detector loops.

Question 20

Cargo compartment fire protection consists of

Answer 20

cargo compartment smoke detection

and cargo compartment fire extinguishing.

Question 21

There are smoke detectors installed in both the forward and aft cargo compartments.

There are

Answer 21

three detection zones in each compartment.

If smoke is detected in any of these zones, a fire warning will occur.

Question 22

There are ——– extinguisher bottles installed for cargo compartment fire extinguishing.

Answer 22

5

Question 23

Once armed in flight, pushing the CARGO FIRE DISCHARGE switch will cause the immediate discharge of

Answer 23

two extinguisher bottles into the selected compartment.

Question 24

The remaining three cargo bottles will be

Answer 24

discharged at a reduced flow rate into the selected compartment after a time delay.

Pushing the CARGO FIRE ARM switch is considered moving a critical control in flight according to the Flight Manual Introduction to Non-Normal Checklists.

Both pilots must agree before pushing this switch. Discharging the agent with the wrong compartment armed would eliminate fire extinguishing capabilities.

Should the airplane land before the remaining bottles discharge, only one of the bottles will discharge at the reduced rate.

Question 25

In the event of a cargo compartment fire on the ground, pushing the CARGO FIRE DISCH switch will cause

Answer 25

the immediate discharge of two extinguisher bottles into the selected compartment.

Only one of the remaining bottles will discharge after the time delay.

Question 26

Fire protection systems are installed in the Door 3 Upper Crew Rest Compartment and

Answer 26

the Lower Crew Rest Compartment (LCRC), (if installed).

Question 27

The Door 3 Upper Crew Rest Compartment smoke indications are displayed and annunciated

Answer 27

on the Door 3 Upper Crew Rest Area Main Control Panel,

which is located at the top of the stairs of the entrance enclosure,

and on the call reset light / switch above the entrance.

Question 28

The LCRC is equipped with a fire detection system and manually activated

Answer 28

fire extinguishing system.

Question 29

In the event of smoke in the LCRC, the following will occur:

Answer 29

The MASTER CAUTION activates and a SMOKE CREW REST LWR EICAS caution message will be displayed in the cockpit,

an amber light above the entrance enclosure door will flash in the cabin, a continuous chime will sound throughout the cabin,

a SMOKE DETECTED LCR message will appear on the cabin system displays, the cabin attendant master call lights will flash,

the FIRE, AIR FLOW OFF, and EVAC lights will illuminate on the attendant switch panel in the entrance enclosure,

the fire horn and smoke detector integral horn will sound in the entrance enclosure,

an EVAC MODULE indicator on the control / warning panel will illuminate in the lower crew rest compartment,

the smoke horn will sound intermittently in the lower crew rest compartment, and the oxygen horn will sound continuously in the lower crew rest compartment.

Question 30

The LCRC fire extinguishing system can be activated from the attendant switch panel, located inside the entrance enclosure. There is no cockpit indication.

A fire light on the Attendant Switch Panel indicates that smoke is detected in the LCRC. Portable fire extinguishers are also installed.

To manually activate the fire extinguishing system:

Answer 30

Arm the system by pushing the ARM EXTING switch,

verify the ARM light illuminates.

Lift the guard and push the DISCHARGE BOTTLE switch,

verify that the DISCH light illuminates within 15 seconds.

Question 31

Each lavatory has a single smoke detector. In the event of smoke detection,

Answer 31

an aural alert will sound in the lavatory and in the cabin.

In addition, the lavatory call light will flash and the master call light at the

associated attendant station will illuminate.

Question 32

A fire extinguisher is located in the waste container cabinet. In the event of smoke or fire, the fire exinguisher will

Answer 32

discharge automatically. There is no flight deck indication.

Question 33

The fire and overheat detection system has

Answer 33

automatic and manual fault testing.

Question 34

Engine and APU fire / overheat detector loops are continuously

Answer 34

monitored for faults.

Question 35

The cargo and wheel well systems continuously

Answer 35

monitor for any system faults.

The system will automatically reconfigure for single loop operation if a fault is detected.

Question 36

Complete system failures are indicated by an EICAS advisory message for the failed system:

Answer 36

DET FIRE ENG (L or R),

DET FIRE APU,

and DET FIRE CARGO (FWD or AFT).

Question 37

Manual testing of the fire and overheat detection systems is accomplished by

Answer 37

pushing and holding the FIRE / OVHT TEST switch.

Question 38

The indications for a manual fire and overheat detection system test are:

Answer 38

the fire bell rings,

the nose wheel well APU fire warning horn sounds (on the ground)

and the EICAS warning message FIRE TEST IN PROG is displayed.

the master WARNING lights,

the LEFT and RIGHT engine fire warning lights,

the LEFT and RIGHT FUEL CONTROL switch fire warning lights,

the APU fire warning light,

the FWD and AFT CARGO FIRE warning lights

and the nose wheel well APU fire warning light.

When the test is complete,

the EICAS warning message FIRE TEST PASS

or FIRE TEST FAIL

replaces the FIRE TEST IN PROG message;

the switch can then be released.

Question 39

All test messages clear when the test switch is released.

If the switch is released with the FIRE TEST IN PROG message displayed,

Answer 39

the test ends without completing.

Question 41

With either engine running, the APU fire protection system alerts the crew of an APU fire only if both detection loops detect a fire.

If a fault is detected in one loop,

Answer 41

the system automatically switches to single loop operation. If the operating loop then senses a fire, an APU fire warning will occur.

When an APU fire signal is detected the APU automatically shuts down.

The fire switch automatically unlocks. Pull the APU fire switch.

Pulling the APU fire switch accomplishes the following:

The APU fuel valve and APU bleed air valve close.

The APU shuts down if the automatic shutdown has failed.

The APU air inlet door closes.

The APU generator field and breaker are tripped.

The APU fire extinguisher bottle is armed.

Question 42

When the airplane is on the ground with both engines shutdown and the APU operating, only one detection loop is

Answer 42

necessary to detect a fire.

In this case, the detection of an APU fire causes the APU to automatically shutdown and the fire bottle to automatically discharge.

Question 43

Pushing the CARGO FIRE ARM switch accomplishes the following:

Answer 43

All cargo fire extinguisher bottles and the selected compartment extinguisher valve are armed.

Both lower recirculation fans are turned off.

Both packs are commanded to provide the minimum airflow required to provide pressurization.

The equipment cooling system is put into override mode (forward cargo fire only).

The lavatory / galley vent fan shuts down (aft cargo fire only);

the bulk cargo compartment ventilation system shuts down (aft cargo fire only).

The EICAS caution message SMOKE CREW REST LWR may display during a descent following an aft cargo fire.

The pressure differences between the aft cargo compartment and the lower crew rest compartment can cause smoke to enter the crew rest compartment.

The cargo heat system also shuts down.

Question 44

Pushing and holding the CARGO FIRE DISCH switch for 1 sec immediately discharges

Answer 44

two bottles.

The CARGO FIRE DISCH switch light illuminates when the first two extinguisher bottles begin to discharge.

The compartment extinguisher valve for the aft compartment is also activated.

After the first two bottles have completely discharged, the EICAS advisory message BOTTLE DISCH CARGO displays.

Following a time delay, the remaining three extinguisher bottles discharge at a reduced flow rate into the selected compartment

f the airplane lands before the remaining bottles are commanded to discharge, one of these bottles discharges at the reduced rate on touchdown.

If the airplane is on the ground when the discharge sequence begins, and after the two rapid dump extinguisher bottles have discharged into the selected compartment, only one of the remaining extinguisher bottles discharges after the time delay.

Question 45

When the FWD CARGO FIRE ARM switch is pushed, the same results occur as when the AFT switch is pushed; however, in addition,

Answer 45

the equipment cooling system automatically reconfigures to the override mode.

Also, it does not shut down the bulk cargo compartment ventilation system, neither does it shut down the lavatory / galley vent fan. Both only shut down when the AFT switch is pushed.

Question 46

With an engine fire, the system alerts the crew of a fire normally if

Answer 46

both detection loops detect a fire.

After the master WARNING is cancelled,

the autothrottle arm switches are switched off,

and the associated thrust lever is closed,

the associated FUEL CONTROL switch is moved to the CUTOFF.

Question 47

Pulling the engine fire switch causes:

Answer 47

the associated engine and spar fuel valves to close,

if not already closed by the associated FUEL CONTROL switch,

the engine bleed air valves to close,

hydraulic fluid to the associated engine driven pump to be shut off

and the associated engine driven pump to be depressurized,

the associated engine generator to trip off,

the appropriate discharge squib to arm on each engine fire extinguisher.

Question 48

The engine fire protection system also detects engine overheat conditions. Normally, both loops must detect an

Answer 48

overheat condition to cause an overheat caution.

Question 49

The main gear wheel well contains a dual loop fire detection system for

Answer 49

each main gear.

There is no extinguishing system provided for the main wheel well.

Observe the gear EXTEND speed limit, and then extend the landing gear.

This attempts to remove and extinguish the fire source.

When the temperatures in the wheel well are below fire levels, the EICAS warning message is removed.

Once extended, the gear should remain down and a landing made at the nearest suitable airport.

Question 50

Normally, the fire switches unlock if a fire is detected or when the FUEL CONTROL switch is in CUTOFF. If a fire switch fails to unlock,

Answer 50

the fire override switch must be used.