Cargo Compartments

Question 1

Is cargo fire a memory item?

Answer 1

No

Question 2

What type of fire detection is used in the cargo compartments?

Answer 2

Smoke detectors

Question 3

How many fire bottles are in the cargo fire protection system?

Answer 3

5

Question 4

What happens when you press either fwd or aft cargo fire arm switch?

Answer 4

1. Extinguisher bottles are armed for firing
2. Valves are selected to the proper compartment
3. Shuts off cargo heat
4. Selects equipment cooling to over ride if FWD
5. Shuts off bult ventilation
6. Activates lower crew rest evac system if aft.

Question 5

After fighting a cargo fire, would ou expect to see the icas message go away?

Answer 5

Not immediately because the smoke detectors cannot distinguish smoke from halon.

Question 6

When fighting a cargo fire, what is the bottle discharge sequence?

Answer 6

In Flight: 2 bottles discharge immediately under high flow, the other 3 bottles are discharged at a reduced rate starting 15 minutes later. If the airplane lands before the bottles are discharged, one of the 3 remaining bottles at the reduced rate on touchdown.

On the ground: 2 bottles discharge immediately but only one of the remaining bottles discharges are a time delay.

Question 7

What o we need to be aware of when the equipment cooling is operating in the override mode and we are at low altitude and high ambient temps?

Answer 7

Possible equipment failure from overheat due to low air flow.