FIRE AND OVERHEAT PROTECTION

Question 1

1. How can you silence a fire warning bell?

Answer 1

 Press bell cutout or fire warning light

Question 2

2. Some simple faults will not illuminate the

Master Caution Light and a system annunciator until RECALL. How can you reset the annunciator and the system light?

Answer 2

 Press MC light

Question 3

3. What is the power source for fire detection?

Answer 3

 Battery bus (BB)

Question 4

4. What is the power source for fire protection?

Answer 4

 Hot battery bus (HBB)

Question 5

5. What is the power source for wheel well fire

detection?

Answer 5

 #1 AC transferbus (TB)

Question 6

6. What happens when you pull an engine fire handle?

Answer 6

 Arms one discharge squib on each engine fire extinguisher
 Closes the fuel, hydraulic and engine bleed air valves
 Disables the thrust reverser
 Trips generator control relay & breaker
 Deactivates ENG HYD low pressure light
 Allows rotation of the fire switch

Question 7

7. Where are the engine fire bottles located?

Answer 7

 Wheelwell

Question 8

8. What are the indications of an APU fire?

Answer 8

 Fire warning bell sounds
 Both fire warning lights illuminate
 APUfirewarningswitchilluminates
 APU automatically shuts down
 Wheel well fire warning horn sounds (on
ground only) & wheel well light flashes

Question 9

9. Where is the APU fire bottle located?

Answer 9

 At the APU compartment

Question 10

10. What happens when you pull the APU fire handle?

Answer 10

 Arms the APU extinguisher circuit
 Closes fuel shutoff valve, APU bleed air
valve, and APU inlet door
 Trips Gen control relay and breaker
 Allows the APU fire switch to rotate

Question 11

11. How many lights should you get on a normal test?

Answer 11

 Five: Two green, Two red & an amber

Question 12

12. Will you get a fire warning bell and FIRE

WARN lights?

Answer 12

 Yes

Question 13

13. In flight, if a DETECTOR FAULT light

illuminates, what has happened?

Answer 13

 Both loops in one or both cargo compartments have failed

Question 14

14. What if a DETECTOR FAULT light illuminates during a test?

Answer 14

 One or more detectors in the loop(s) has failed