Oral Prep - Fire Protection

Question 1

What areas are monitored by the fire and overheat protection system?

Answer 1

Engines, jetpipe, pylon, APU and main landing gear

Question 2

What are the benefits of the dual detection loop system?

Answer 2

Redundancy and Dispatchability

Question 3

How many Firex bottles are provided for engine fire extinguishing?

Answer 3

2 Halon bottles.

Question 4

How many Firex bottles are provided for APU fire extinguishing?

Answer 4

1 Halon bottle

Question 5

When will APU fire extinguishing activate automatically?

Answer 5

On the ground in the event of an APU fire

Question 6

What does the WARN position of the TEST toggle switch simulate?

Answer 6

A fire or overheat condition.

Question 7

What does the FAIL position of the TEST toggle switch simulate?

Answer 7

A “false fire” condition.

Question 8

What are the aural and visual indications of a successful APU Fire Warning test during the APU Power Up Procedure?

Answer 8

Select FIRE DETECTION TEST switch to WARN: Triple Chime, Master Warning, Fire bell sounds, L(R) ENG FIRE, APU FIRE, and L(R) JETPIPE OVHT warning messages appear (5), “JETPIPE OVERHEAT” aural warning sounds, FIRE PUSH and BOTTLE ARMED PUSH TO DISCH lights illuminate. Release switch, and ensure all test messages go out. Select APU BOTTLE toggle switch to TEST and hold. APU SQUIB 1(2) advisory messages appear. After 10 seconds both disappear and fire horn sounds. Release switch and APU SQUIB 1(2) advisory messages reappear and disappear after 5 seconds.

Question 9

What are the aural and visual indications of a successful Fire protection test during the First Flight Check?

Answer 9

FIREX MONITOR, APU BOTTLE switch to Test… APU SQUIB 1 and APU SQUIB 2
FIRE DETECTION TEST switch to WARN… Fire bells, JET PIPE OVERHEAT oral warning, Triple Chime, Master Warnings, APU FIRE PUSH, APU BOTTLE ARMED PUSH TO DISCH switch lights illuminated, APU FIRE warning message on EICAS