8: Fire Protection

Question 1

There are fire detection and extinguishing systems for:

Answer 1

Engines
APU
Lavatories

Question 2

What has a fire detection but no fire extinguishing?

Answer 2

Main gear wheel well

Question 3

Cargo compartment, what does it have?

Answer 3

Smoke detection and fire suppression systems

Question 4

Engine fire protection- powered by which bus?
1) Overheat and fire detection
2) fire extinguishing

Answer 4

1) battery bus
2) hot battery bus

Question 5

Cargo fire protection- powered by which bus?
1) Smoke detection
2) fire supression

Answer 5

1) DC bus 1 and DC bus 2
2) hot battery bus

Question 6

Explain what happens when the cargo DISCH switch is pushed (MAX)

Answer 6

The HRD (high rate discharge) bottle discharges and starts a 15 min timer. After 15 min the LRD discharges at a reduced metered flow

Question 7

Explain what happens when the cargo DISCH switch is pushed (NG)

Answer 7

For the single bottle option, the whole bottle is discharged

For the two bottle, the first bottle is discharged and then the second bottle is discharged at a metered rate

Question 8

Cargo fire supression- how long? (MAX)

Answer 8

195 minutes, that is 180 min flight and 15 min reserve

Question 9

Cargo fire supression- how long? (NG)

Answer 9

Two options:
FDZ to FEG- 75 minutes, 60 min flight plus 15 min reserve

The rest- 195 minutes, that is 180 min flight and 15 min
reserve