Fire Protection system

Question 1

How many fire bottles on the 777F?

(FCOM 8.20)

Answer 1

• 2 engine bottles
• 5 lower cargo bottles
• 1 APU bottle
• Lav

Question 2

What does the fire and overheat detection system testing automatic fault test do?

(FCOM 8.20.6)

Answer 2

Continuously monitors engine, APU, wheel well, cargo loops for faults.

Question 3

With the engine fuel switch in run, can the fire switch be pulled?

(FCOM 8.20.2)

Answer 3

• Fire switch override
• Fire warning

Question 4

Pulling an ENGINE FIRE SWITCH does what?

(FCOM 8.10.1)

Answer 4

1. Arms both engine fire extinguishers.
2. Closes the associated engine and spar fuel valves.
3. Closes the associated engine bleed air valves.
4. Trips the associated engine generators off.
5. Shuts off hydraulic fluid to the associated engine driven hydraulic pump.
6. Depressurizes the associated engine driven hydraulic pump.
7. Removes power to the thrust reverser isolation valve.

Question 5

With a MAIN DECK CARGO FIRE, arming the MAIN DECK FIRE switch does what?

(FCOM 8.10.3)

Answer 5

1. Turns off aft cargo air conditioning supply and exhaust.
2. Commands EE cooling to provide pack air to flight deck equipment.
3. Turns off both recirc. fans.
4. Turns off lav/galley vent fans.
5. Turns off main deck cargo compartment air in flow.
6. Commands pack to supply air to flight deck and supernumerary areas only.
7. Turns off cargo heat.
8. Inhibits lower cargo compartment fire warnings
9. Turns off electrical power outlets.
10. Turns off the Nitrogen Generation system.

Question 6

With a LOWER FWD CARGO FIRE, pressing the CARGO FIRE DISCHARGE switch does what?

(FCOM 8.20.5)

Answer 6

• In the air: Immediately discharges 2 fire extinguisher bottles into the ARMED cargo compartment. Remaining 3 bottles discharge at a metered rate after 20 minutes. Upon landing, one of the remaining bottles discharges at a metered rate.
• On the ground: Immediately discharges 2 fire extinguisher bottles into the ARMED cargo compartment. However, only one of the remaining extinguisher bottles discharges after the time delay.

Question 7

Are the engine fire loops a AND or an OR logic system?

(FCOM 8.20.1)

Answer 7

AND (under normal operation)

Question 8

What fire protection is in the wheel well?

(FCOM 8.20.4)

Answer 8

None. Detection only in main gear well. Nose gear has no detection system at all.

Question 9

How many overheat loops are installed for the APU?

(FCOM 8.20.4)

Answer 9

None.

Question 10

Where is the APU ground control panel located?

(FCOM 8.10.5)

Answer 10

Nose gear.