Fire Protection System

Question 1

What fire detection systems do not self test when AC power is first applied to the aircraft?
(AOM Vol II, Ch 8)

Answer 1

• Wheel well fire detection.

* Bleed duct overheat detection.

Question 2

What happens when the Main Deck Fire Arm switch is pressed?
(AOM Vol II, Ch 8)

Answer 2

• Shuts down two packs.
• Configures Equipment Cooling to closed loop.
• Shuts off all airflow to the main deck.
• Shuts off all lower cargo airflow and heat.
• Closes master trim air valve.
• Enables main deck fire suppression.

Question 3

Where is the airflow from the remaining pack directed?
(AOM Vol II, Ch 2)

Answer 3

• Airflow from the remaining pack (1 or 3, so long as all pack switches are left in NORM, IAW the QRH) is directed to the cockpit at a reduced rate of 600 cfm.

Question 4

What is the total time of fire suppression available to the lower lobe cargo compartments?
(AOM Vol II, Ch 8)

Answer 4

• 334 minutes of suppression is available to either the forward or aft lower cargo compartment.

Question 5

What are the Memory Items for an Engine Fire in flight? (QRH, Ch 8)

Answer 5

1

Question 6

How many overheat loops are installed for the APU?

AOM Vol II, Ch 8

Answer 6

• There are no overheat loops for the APU.

Question 7

What is the indication in the cockpit that an engine fire/overheat loop has failed?
(AOM Vol II, Ch 8)

Answer 7

• There is no cockpit indication. The system automatically configures to OR logic.

Question 8

What does the careted EICAS message “>DET FIRE/OHT 1” mean?
(AOM Vol II, Ch 8)

Answer 8

• Engine fire overheat loops A and B have failed.

* Fire detection for engine 1 is not available.

Question 9

You are in cruise in a normal aircraft. The PNF reaches up and, before you can stop him, he pulls the Engine Fire Switch What happens?
(AOM Vol II, Ch 8)

Answer 9

• Nothing, the switch is mechanically locked, unless the fuel switch is moved to Cutoff or a fire is sensed.

Question 10

There is a fire. Now what happens when the PNF pulls the Engine Fire Switch?
(AOM Vol II, Ch 8)

Answer 10

• Closes the related engine and spar fuel valve.
• Closes the related engine bleed valve.
• Trips the related engine generator.
• Shuts off hydraulic fluid to the related engine-driven hydraulic pump.
• Depressurizes the related EDP.
• Arms the fire extinguishers.