[747-400] Fire Protection (Sv)

Front 1

In the engine fire detection system, how many loops are provided?

Back 1

A dual loop fire detector is installed in each engine nacelle.

Front 2

During normal operations do both loops have to sense the fire to activate the respective engine fire warning?

Back 2

Yes.

Front 3

Is the engine fire detection system an "AND" logic system or an "OR" logic system?

Back 3

Engine fire detection is an "AND" logic system (dual detection required).

Front 4

Can an EICAS fire message be canceled?

Back 4

No, Warning messages CANNOT be canceled.

Front 5

When are the fire bell and master warning lights inhibited?

Back 5

During takeoff from V1 to 400 feet RA or 25 seconds after V1, whichever comes first.

Front 6

How is a fault in one of the engine fire detection loops indicated?

Back 6

An EICAS Status message (each loop is continuously tested).

Front 7

With AC power on the aircraft, what happens when a single loop fault occurs in the engine fire detection system?

Back 7

The system continuously monitors for faults. Upon detection it automatically reconfigures for single loop operation.

Front 8

What happens when faults are detected on both loops in an engine fire detection system?

Back 8

• >DET FIRE/OHT EICAS Advisory message-
• two EICAS Status messages: ENG FIRE LP A/B.

Front 9

In the event of an engine fire, the fire bell rings. It can be silenced by:

Back 9

Pushing either Master Warning/Caution Reset switch or extinguishing the fire.

Front 10

In the event of an engine fire, the associated Engine Fire switch, ENG FIRE warning message, and Fuel Control Fire light will illuminate red until:

Back 10

The fire is extinguished.

Front 11

What is provided for engine overheat detection?

Back 11

In addition to the dual loop fire detection circuit, each engine also has a dual loop overheat detection circuit.

Front 12

Is the dual loop APU fire detection system an "AND" logic system or an "OR" logic system?

Back 12

APU fire detection is an "OR" logic system. Either loop sensing a fire activates the fire warning and shuts the APU down.

Front 13

TRUE OR FALSE. The APU fire extinguisher is automatically discharged when the APU fire handle is pulled out.

Back 13

False, the APU fire handle must be rotated in either direction to discharge the bottle. The APU does shut down automatically.

Front 14

Will an Engine Fire switch automatically unlock for an overheat?

Back 14

No, but it can be manually unlocked.

Front 15

After a fire/overheat loop malfunction, if the remaining loop senses a fire or overheat, will the respective engine fire warning or overheat be activated?

Back 15

Yes.

Front 16

What sort of fire detection is provided in the wheel well area?

Back 16

The wheel well fire detection system consists of a single loop detector in each main gear wheel well. (Tested only by pushing the FIRE/OVHT Test switch or at initial power application).

Front 17

What fire protection system is available in the wheel wells?

Back 17

No extinguishing system is installed in the wheel wells; extend the gear.

Front 18

Is there smoke detection in the lavatories?

Back 18

Yes, independent smoke detectors are installed in each lavatory.

Front 19

When smoke is detected in a lavatory, how can the >SMOKE LAVATORY EICAS Caution message be cleared and the smoke detector reset?

Back 19

When the lavatory smoke detector is clear of smoke or the lavatory smoke detector test switch is rotated counterclockwise and back to normal, the system is reset and the message clears.

Front 20

If a fire is detected in the lavatories, what fire protection is available?

Back 20

An automatic fire extinguishing system is located beneath the sink in each lavatory waste compartment. Water and halon bottles are in the main cabin.

Front 21

If the >SMOKE LAVATORY EICAS Caution message appears how do you know which lavatory is affected?

Back 21

Each lavatory has a light on the outside that illuminates if smoke is detected. The smoke detector in each lavatory is equipped with a warning horn. The Flight Attendant master call light and chime sounds.

Front 22

Is there fire detection in the door 5 crew rest area?

Back 22

Yes, a smoke detector system is installed in the door 5 crew rest area.

Front 23

Is there fire protection in the door 5 crew rest area?

Back 23

Yes, both halon and water fire extinguishers are in the door 5 crew rest area (no automatic system), along with a PBE.

Front 24

What fire detection and/or protection system is available for the flight deck crew rest area?

Back 24

No fire detection, but there is 1 halon bottle located in the flight deck and 3 halon and 1 water extinguisher located in the upper deck.

Front 25

What fire detection logic is provided in the forward and aft cargo compartments?

Back 25

The forward and aft cargo compartments each have two smoke detector modules. Within each detector module there are two photo cell sensor loops. Both of the sensor loops in one module must sense a fire to activate the cargo fire warning (AND logic).

Front 26

Where does sample air come from for the cargo smoke detectors?

Back 26

Cargo compartment air is drawn through the detectors by a pressure differential created by the pneumatic system center duct.

Front 27

How is the flight crew alerted to the failure of one or both photo cell sensor loops in a cargo smoke detector module?

Back 27

Only if a Fire/Overheat test is accomplished. CARGO DET FWD/AFT (1, 2, 3, 4) EICAS Status message(s) are generated for the failed component.

Front 28

The fire bell rings and a forward cargo fire is indicated. After completing the COM procedure you notice that the EICAS Warning message FIRE CARGO FWD and the warning lights are still indicated. Why?

Back 28

The warning lights will remain illuminated as long as smoke exists in the compartment. When the bottles are discharged the smoke detectors can’t distinguish between smoke particles and retardant particles.

Front 29

TRUE OR FALSE. The cargo compartment fire detector system will automatically configure to a single detector system if a fault occurs.

Back 29

False. There is no continuous testing.

Front 30

If a single photo cell sensor loop fails in the cargo compartment, how can that detector module be reconfigured for single photo cell sensor loop operation?

Back 30

There are only two ways: push the Fire/Overheat Test switch (by MEL procedure), or, with initial electrical power application to the aircraft.

Front 31

If a fire is sensed in the engine or APU areas, how are the fire bottles discharged?

Back 31

If an engine or APU fire is sensed the respective fire switch is electrically unlocked and can be pulled out and rotated to discharge the associated bottle.

Front 32

If the fire switch is NOT released electrically, how can the fire bottle be discharged?

Back 32

By simultaneously depressing the manual fire override switch behind the fire switch and pulling the fire switch. Rotating the switch will then discharge the extinguishing agent.

Front 33

How many fire extinguisher bottles are provided for engine fire extinguishing?

Back 33

Two per wing.

Front 34

What happens when an engine fire switch is pulled?

Back 34

The engine shuts down. Bottle A and B discharge squibs are armed. Fuel, hydraulics, electrics, and pneumatics are isolated from the engine.

Front 35

How much time should pass before discharging the second fire extinguisher bottle into an engine that continues to have an illuminated fire warning light?

Back 35

30 seconds, as per the “Red Bordered” checklist.

Front 36

How many fire bottles are provided for cargo compartment fire extinguishing?

Back 36

Four.

Front 37

How many fire bottles are provided for APU fire protection?

Back 37

One.

Front 38

Which direction must the APU fire switch be turned to discharge the fire bottle?

Back 38

The switch can be rotated in either direction.

Front 39

What is the sequence of discharge for the cargo compartment fire extinguishing system?

Back 39

After pushing a Cargo Fire Extinguishing Armed switch (FWD or AFT), pushing the Cargo Fire Bottle Discharge switch immediately discharges bottles A and B into the armed compartment. The EICAS Advisory message BTL LOW CARGO A and BTL LOW CARGO B illuminate followed by the DISCH light. Extinguisher bottles C and D automatically begin a metered discharge after a brief delay (approximately 30 minutes). If not previously discharged, bottles C and D will discharge upon landing providing metered flow.

Front 40

Do bottles C and D empty their contents immediately?

Back 40

No. When bottles C and D discharge, they maintain a metered flow to give protection for a total of 195 minutes from the time the DISCH switch was pressed.

Front 41

How is the cargo fire detection system tested?

Back 41

By the manual FIRE/OVHT TEST switch or when electrical power is initially applied to the aircraft (not continuously tested).

Front 42

If a crewmember pushes and holds in the FIRE/OVHT TEST switch, what is the EICAS indication?

Back 42

EICAS Warning message >TEST IN PROG displays first, followed by an EICAS Warning message >FIRE TEST PASS or >FIRE TEST FAIL within 10 seconds.

Front 43

What fire and overheat detection systems are fault tested during the manual test?

Back 43

-Engine--APU--Wheel Well--Bleed Duct Leak--Cargo FWD and AFT.

Front 44

Does automatic testing of all dual loop engine fire/overheat detectors, APU fire detectors, and cargo compartment smoke detectors occur when electrical power is initially applied?

Back 44

Yes.

Front 45

Will the APU shut itself down if a fire is detected?

Back 45

Yes, but the fire extinguisher must be manually discharged.

Front 46

During your walk around you hear the APU fire warning horn sound and then hear the APU shutdown. To ensure the fire extinguishing agent is discharged into the APU compartment you must:

Back 46

Pull the red APU fire control handle in the right body gear wheel well and then push the adjacent APU Extinguisher Discharge switch.

Front 47

What aural indications are there of an APU Fire?

Back 47

Flight deck warning bell rings intermittently, one second on, then 10 seconds off.

Front 48

What additional aural indications are present if an APU fire is detected on the ground?

Back 48

The APU fire warning horn also sounds on the APU ground control panel in the right body gear wheel well.

Front 49

How can the aural APU fire warning bell in the flightdeck be silenced?

Back 49

-Extinguish the fire--Push either Master Warning/Caution Reset switch (wheel well horn will continue to sound).

Front 50

What occurs when the APU Fire switch on the flight deck is pulled?

Back 50

-Arms the discharge squib--Closes the APU fuel valve insuring a positive APU shutdown--Closes the APU bleed air isolation valve--Trips both APU generator fields and generator breakers--Shuts down the APU (no cool down)--Silences horn in wheel well.

Front 51

What are the fire indications at the remote APU Ground Control panel?

Back 51

-APU FIRE light--Intermittent horn (sounds on the ground only).

Front 52

When does the APU FIRE light go out on the APU ground control panel and the flight deck APU Fire handle?

Back 52

When the fire condition no longer exists.

Front 53

How do you fight an engine fire?

Back 53

Pull the indicated engine fire switch. Rotate the switch in the “A” or “B” direction.

Front 54

How is fire bottle discharge confirmed?

Back 54

-EICAS Advisory message >BOTTLE LOW APU; >BTL LOW L/R ENG A/B; >BTL LOW CARGO.--Bottle Discharge light is illuminated.

Front 55

How do you discharge engine fire bottles into both engines 1 and 2?

Back 55

Rotate engine fire switches 1 and 2 in the same direction. One bottle will discharge into engine 1, the other will discharge into engine 2.

Front 56

The area provided with fire detection but NOT provided with a discrete fire light on the flight deck is the _________.

Back 56

Wheel well.

Front 57

How do you discharge two fire bottles into the same engine?

Back 57

Rotate the engine fire switch to bottle A. After 30 seconds rotate the same engine fire switch in the opposite direction to bottle B.

Front 58

In the event of a fire in the lower electronics bay, how can you gain access to fight the fire?

Back 58

An access hatch is located on the floor in the left aisle forward of door 1Left. Requires the silver key to unlock.