Fire Protection

Question 1

When the APU Fire Push switch/light is press the following occurs.

Answer 1

• The bottle squibs are armed, APU BOTTLE ARMED PUSH TO DISCH switch/light illuminates
  *APU shuts down (if not already shut down)
  *APU fuel shutoff valve (SOV) closes
  *APU negative-G shutoff valve (SOV) closes
  *APU LCV closes
  *APU generator shuts down

Question 2

Two separate subsystems in the fire protection system.

Answer 2

• Fire and overheat detection system
• Fire extinguishing system

Question 3

Smoke detection is provided in what areas?

Answer 3

Baggage compartment and the lavatory

Question 4

Fire extinguishing system delivers an extinguishing agent to what protected areas of the aircraft?

Answer 4

Zone A of the engines and the APU enclosure

Question 5

Two portable fire extinguishers are where?

Answer 5

One in the flight deck (Co-pilot) and two in the cabin.

Question 6

What Zone of the engine fire and overheat protection system does NOT provide extinguishing?

Answer 6

Zone B (jet pipe and pylon area)

Question 7

Heat-Sensing elements to each Zone is a?

Answer 7

Single continuous heat-sensing element (Loop). The resistance of the insulating material decreases with an increase in temperature. The outer metal sheathing is permanently grounded.

Question 8

Zone A fire warning signal causes the following aural and visual warnings to occur:

Answer 8

• L(R) ENG FIRE warning EICAS message is displayed
• Master warning switch/lights illuminate flashing
• Applicable red LH (RH) FIRE PUSH switch/light illuminates
• fire bell sounds

Question 9

Zone B fire warning signal causes the following aural and visual warnings to occur:

Answer 9

-L (R) JETPIPE OVHT warning EICAS message is displayed
-MASTER WARNING switch/lights illuminate flashing
-“JETPIPE OVERHEAT” aural warning sounds

Question 10

APU squib is different from the engine squib in what way?

Answer 10

It has dual firing cartrides for redundancy

Question 11

What happens when you press the LH (RH) ENG FIRE PUSH switch/light?

Answer 11

• The firex bottle squibs are armed, both BOTTLE 1 and 2 ARMED PUSH TO DISCH swith/lights illuminate
• Engine generator shuts down
• Fuel shutoff valve (SOV) closes
• Hydraulic shutoff valve (SOV) closes
• Bleed air shutoff valve (SOV) closes
• Associated engine igniters disabled