Fire Detection/Protection

Question 1

How many engine fire loops and what type?

Answer 1

• (6) total fire detection loops gaseous-type (helium gas)

Question 2

How many loops in each engine nacelle and what zones do they monitor?

Answer 2

• (3) fire detection loops located in each engine nacelle and monitor the following zones: Leading Edge Zone (LEZ), Primary Engine Zone (PEZ), and Main Wheel Well zone (MWW)

Question 3

If the engine loop is punctured (loses pressure) or loses electrical power, a fault signal will be processed by the…

Answer 3

• If the loop is punctured (loses pressure) or loses electrical power, a fault signal will be processed by the Control Amplifier

Question 4

“FAULT A” Indications:

If the PEZ loop fails OR the LEZ loop fails…

Answer 4

• If the PEZ loop fails OR the LEZ loop fails, a FAULT A indication will result.

Question 5

“FAULT A” Indications:

If the PEZ loop detects fire OR the LEZ loop detects FIRE…

Answer 5

• If the PEZ loop detects fire OR the LEZ loop detects FIRE, a FIRE indication will result.

Question 6

“FAULT A” Indications:

If the PEZ loop fails (fault indication given) AND the LEZ loop detects fire…

Answer 6

• If the PEZ loop fails (fault indication given) AND the LEZ loop detects fire, a fire indication WILL also result. The panel will indicate a fault and a fire simultaneously.

Question 7

“FAULT A” Indications:

If the LEZ loop fails (fault indication given) AND the PEZ loop detects fire… what will the panel indicate?

Answer 7

• If the LEZ loop fails (fault indication given) AND the PEZ loop detects fire, NO fire indication will result. The panel will indicate a FAULT only

Question 8

“FAULT B” indication is associated with a…

Answer 8

“FAULT B” indication is associated with a MWW fail

Question 9

An engine fire is indicated by the (5) fire warning lights and (1) Aural Warning:

Answer 9

• Respective engine’s :PULL FUEL/HYD OFF” T-handle light (red) on the FPP
• MASTER WARNING light (flashing red) on the glareshield
• CHECK FIRE DET warning light (flashing red) on the warning light panel
• Both ENGINE FIRE PRESS TO RESET lights (flashing red) on the left and right sides of the glareshield
• Also, a fire “warning tone” would be heard

Question 10

How many engine fire bottles, location, and distribution?

Answer 10

• (2) Fire extinguisher bottles (designated FWD and AFT) are installed in the left wing root
• Both shots to one engine or one shot to each engine

Question 11

When the respective T-handle is pulled:

Answer 11

•When the respective T-handle is pulled:
o	Fuel valve is closed
o	Hydraulic valve is closed
o	FWD and AFT Fire bottles are Armed
o	Squib is Armed

Question 12

Engine Fire Detection System Test
To test Engine #1
•Press and hold the “Test Detection” to the LEFT (on FPP)
•Aural Warnings
o	Engine Fire “Warning Tone”
•Visual Warnings
•Remember: The “3-1-3-Rule”

Answer 12

3 light indications: Overhead Panel (FPP)
#1 PULL FIRE/HYD OFF Handle
“FAULT A” (amber light)
“FAULT B” (amber light)
1 Light indication: Caution Warning Panel (CWP)
“CHECK FIRE DET”
3 light indications: Glareshield
“WARNING Press to Reset” (Captain Side)
“ENGINE FIRE PRESS TO RESET” (Capt & F/O Side)
Aural Indication
Engine Fire “WARNING TONE”

Question 13

APU Fire Detection

Powered by…

Answer 13

• Powered by the RIGHT essential 28vDC bus

Question 14

APU Fire Detection

Describe the detection system.

Answer 14

• (1) fire detection loop gaseous-type (helium gas)

Question 15

What happens if an APU fire is detected?

Answer 15

• If a fire is detected, the APU will automatically shut down and the fire extinguishing agent will be released after 7 seconds

Question 16

What happens if the APU fire loop malfunctions?

Answer 16

• If the APU loop malfunctions, it will be indicated in the cockpit by the simultaneous illumination of the MASTER WARNING, CHECK FIRE DET, and the FAULT advisory light (amber) on the APU section of the FPP

Question 17

Describe the APU fire protection.

Answer 17

• 1 fire bottle (halon 1211)

Question 18

APU Fire Detection Test
•Press the APU “FIRE TEST” Button (on FPP)
•Pushing the APU “FIRE TEST” button while the APU is operation will cause the APU to shut down
•Remember: The “5-1-2-2-Rule”
•Visual Warnings

Answer 18

5 lights: OVERHEAD PANEL (FPP)
•	“APU FUEL CLOSED”(White Light)
•	“BTL ARM” 		(Amber Light)
•	“EXT”			         (White Light)
•	“FIRE”			(Red Light)
•      “FAULT”    (Bottom Yellow Half Light)

1 light OVERHEAD PANEL
(APU CONTROL)
“FAIL” (Amber Light on the Bottom Half of the PWR Button

2 lights CWP (Caution/Warning Panel)
• “APU” (Amber Light)
• “CHECK FIRE DET” (Red Light)

2 lights GLARESHIELD
• “WARNING Press to Reset” (Capt. Side)
• “CAUTION Press to Reset” (F/O Side)

Question 19

Cargo Smoke Detection
Each compartment has independent smoke detection systems. How many detectors and their location in the compartments? Where is a fire indication located?

Answer 19

• 1 (FWD) located above the door
• 2 (AFT) located in the ceiling, one forward and one aft
• Smoke detected in either compartments will be indicated in the flight deck on the Fire Protection Panel (FPP)

Question 20

Cargo Compartment Protection

Forward Baggage Compartment: location of bottles and use.

Answer 20

• (1) “High Rate” fire extinguisher bottle Installed above the forward baggage compartment and is dedicated solely to it
• (1) “Low Rate” located in the tail section of the aircraft, discharges simultaneously with the forward high rate bottle and last approx 45 minutes
• Note: The “Low Rate” fire extinguisher bottle is shared by the forward and aft baggage compartment

Question 21

Cargo Compartment Protection

AFT Baggage Compartment: location of bottles and use

Answer 21

• (1) “High Rate” fire extinguisher bottle Installed in the AFT baggage compartment and is dedicated solely to it
• (1) “Low Rate” fire extinguisher bottle will discharge approximately 7 minutes later and last approx 45 minutes
• Note: The “Low Rate” fire extinguisher bottle is shared by the forward and aft baggage compartment

Question 22

Forward Cargo Fire Detection Test
•Press the “BAGAGGE FWD TEST” Button (on FPP)
•Visual Warnings
•Remember: The “2-1-1-Rule”

Answer 22

2 lights OVERHEAD PANEL (FPP)
•“SMOKE/EXTG” (Bottom White Half Portion)
•“FIRE BOTTLE” (Bottom Left Amber Light “ARM”)

1 light CWP (Caution/Warning Panel)
•“SMOKE”

1 light GLARESHIELD
•“WARNING Push to Reset” (Captain Side)

Question 23

AFT Cargo Fire Detection Test
•Press the “BAGAGGE AFT TEST 1/2” Button (on FPP)
•Visual Warnings
•Remember: The “4-1-1-Rule”

Answer 23

4 lights OVERHEAD PANEL (FPP)
•“SMOKE/EXTG” (Bottom White Half Portion)
•“FIRE BOTTLE” (Top Left Amber Light “ARM”)
•“VENT INLT CLOSED” (White Light)
•“VENT OTLT CLOSED” (White Light)

1 light CWP (Caution/Warning Panel)
•“SMOKE”

1 light GLARESHIELD
•“WARNING Press to Reset” (Captain Side)

Question 24

Lavatory Detection

Number of detectors and how is smoke indicated?

Answer 24

• 1 smoke detector in lavatory

* Smoke detected in the lavatory will only be indicated in the cabin (No indication in the flight deck)

Question 25

Lavatory Protection (Extinguishing)
Bottle location and activation.

Answer 25

• 1 fire bottle located on the roof of the waste container

* Wax plug melts at a given temperature to discharge the bottle