FIRE PROTECTION AND DETECTION

Question 1

How many ENGINE fire extinguishers are provided?

Answer 1

Two on each wing

FCOM, VOL 2; 8.20.4

Question 2

FIRE CARGO FWD: Pressing the FWD cargo fire ARM switch causes what actions?

Answer 2

• Two packs are automatically shut down
• arms lower cargo compartment fire extinguishers
• configures equipment cooling to override mode and turns off all
  airflow and heat into lower cargo compartments
• closes master trim air valve

FCOM 2; 8.10.6 & QRH 8.16

Question 3

How many fire extinguisher bottles are provided for the forward and aft lower cargo compartments.

Answer 3

• 4 fire extinguisher bottles are provided.
  NB: Pushing the Cargo Fire Discharge switch discharges two bottles immediately.
  The other two bottles discharge after a brief delay, or upon touchdown.

FCOM 2; 8.20.6

Question 4

How many APU fire bottles are provided?

Answer 4

1

FCOM 2; 8.20.4

Question 5

What action discharges the APU fire extinguisher?

Answer 5

Rotate the APU fire switch - discharges APU fire extinguisher into APU compartment.
NB: On the ground, the APU extinguisher automatically discharges on
N408MC N418MC, N-PA, N475MC N477MC, N489MC, N492N499MC, N850GT-N859GT

Question 6

Can you shut down the APU from outside the airplane?

Answer 6

Yes
- Located in the right body gear well is the APU Ground Control Fire Protection Panel.
This panel has an APU stop switch, and APU Extinguisher Discharge Switch

Question 7

Is there smoke detection provided for the Crew Rest areas?

Answer 7

Yes
- Smoke detectors are installed in the crew rest areas. An aural warning sounds
in the crew rest compartment when smoke is detected in that compartment.

FCOM 2; 8.20.3

Question 8

What happens when you push the CARGO FIRE Depressurization Switch with the MAIN deck fire switch ARMED?

Answer 8

Initiates airplane depressurization
- enables main deck fire suppression
- turns off two packs
- configures equipment cooling to closed loop and turns off all airflow
to main deck and airflow and heat into lower cargo compartments
- closes master trim air valve

FCOM 2; 8.10.6

Question 9

What unlocks an engine fire switch?

Answer 9

• Fire warning
• FUEL CONTROL switch is in CUTOFF
• Pushing the fire override switch

FCOM 2; 8.10.1; 8.20.4 1.

Question 10

Is the engine fire/overheat detection system a single loop or dual loop system?

Answer 10

Dual loop
- A dual loop fire detector is installed in each engine nacelle
- dual loop overheat detector.
NB: In normal operation, both loops in a detector must detect a fire or
overheat condition to cause an engine fire warning or overheat caution
unless configured for single loop operation.

FCOM 2; 8.20.2

Question 11

What does arming the FWD CARGO fire switch will do on the Passenger aircraft?

Answer 11

•Arms cargo fire extinguisher
•Configures equipment cooling to override mode and turns off
airflow and heat to forward compartment
•Turns off PACK 3
•Turns off nitrogen generation system

FCOM 2; 8.10.4

Question 12

How many fire extinguisher bottles are provided for fire fighting in the
FWD and AFT cargo compartments of the 747-8 aircraft?

Answer 12

6

FCOM 2 747-8; 8.20.4