Fire Protection

Question 1

Upon detection of a fire in the APU, will the fire extinquisher discharge automatically?

Answer 1

NO.
The APU fire extinguisher must be manually discharged by lifting the guard and depressing
the APU Fire Ext Switch

Question 2

1. What is a valid indication of an engine fire?

Answer 2

Left or right fire handle and HP fuel cock illuminated

Question 3

2. When is the engine fire detection fault test normally performed?

Answer 3

During every preflight (on the Before Starting Engines checklist)

Question 4

3. What are the indications when either engine fire test switch is selected?

Answer 4

Loop A & B lights in the test switch
Fire handle and HP fuel cock illuminate
A red “ENGINE HOT” CAS message
A red “ENG FIRE LOOP ALRT” CAS message
Both red master warning light capsules illuminate

Question 5

4. A red “AFT EQUIP HOT” CAS message indicates high temperatures exist in
   the tail compartment. A bleed air leak is a likely cause of the indication. How is
   the faulty side identified?

Answer 5

Check for high TGT, high fuel flow, low EPR or (abnormal) low bleed pressure

Question 6

5. What is the corrective action for an amber “ENG FLT LOOP ALRT” CAS
   message and “FAULT” illuminating on the fire detection panel?

Answer 6

Disable the faulty loop

Question 7

6. What is the corrective action for a red “PYLON HOT” CAS message?

Answer 7

Turn the appropriate bleed air switch OFF

Question 8

7. What items are disabled by pulling a fire handle?

Answer 8

Fuel
Hydraulics
Thrust Reverser
Electrics

Question 9

8. What is the first step following the display of a red “ENGINE HOT” CAS
   message?

Answer 9

Turn the affected engine bleed air switch OFF

Question 10

9. If an amber “ENG FLT LOOP ALRT” CAS message is not resolved, what would
   be the indications in the event of a subsequent engine fire?

Answer 10

The affected engine’s fire handle and HP fuel cock would not illuminate

Question 11

What temperature will the fire bottle thermally discharge?

Answer 11

220°