8. Fire Protection

Question 1

There are fire detection and extinguishing systems for the:

Answer 1

• APU
• Cargo compartments
• Engines
• Lavatories

Question 2

There are fire detection systems (no extinguishing) for the:

Answer 2

• Main gear wheel wells
• Overhead flight crew & flight attendant crew rest

Question 3

Engine Fire Protection

Engine fire protection consists of three systems:

1.
2.
3.

Answer 3

1. engine fire detection
2. overheat detection
3. engine fire extinguishing

Question 4

Cargo Compartment Smoke Detection

________ detectors are installed in the forward cargo compartment.

______ detectors are installed in the aft (____ detectors) / bulk (___ detectors) cargo compartments.

Normally, ___ smoke detectors in the same cargo compartment must detect a fire or overheat condition at the same time to cause a cargo fire warning.

If smoke is detected in the ___ cargo compartment, power is removed from the _______.

Answer 4

Eighteen detectors are installed in the forward cargo compartment.

Eleven detectors are installed in the aft (nine detectors) / bulk (two detectors) cargo compartments.

Normally, two smoke detectors in the same cargo compartment must detect a fire or overheat condition at the same time to cause a cargo fire warning.

If smoke is detected in the aft cargo compartment, power is removed from the HF radios.

Question 5

Cargo Compartment Fire Extinguishing

Cargo fire suppression is provided for ___ minute ETOPS operation.

The most limiting cargo fire suppression system time is __ minutes.

In flight, a fire warning from the cargo fire detection system causes the immediate total discharge of ___ extinguisher bottles into the affected compartment.

After a __ minute time delay, the remaining ______ extinguisher bottles discharge at a reduced flow rate into the affected compartment.

If the airplane lands within the
__ minute time delay, only ___ of the remaining bottles discharges at the reduced
rate on touchdown.

Answer 5

Cargo fire suppression is provided for 330 minute ETOPS operation.

The most limiting cargo fire suppression system time is 300 minutes.

In flight, a fire warning from the cargo fire detection system causes the immediate total discharge of two extinguisher bottles into the affected compartment.

After a 15 minute time delay, the remaining three extinguisher bottles discharge at a reduced flow rate into the affected compartment.

If the airplane lands within the
15 minute time delay, only one of the remaining bottles discharges at the reduced rate on touchdown.

Question 6

Cargo Compartment Fire Extinguishing

In flight, pushing the CARGO FIRE DISCHARGE switch also activates the extinguishing system.

On the ground, if a CARGO FIRE DISCHARGE switch is pushed, ______ extinguisher bottles discharge simultaneously into the selected compartment, with
the _____ bottle discharging at a reduced flow rate.

When cargo fire extinguisher bottle discharge is initiated and the first two extinguisher bottles begin to discharge:
- the ________________________ switch light illuminates
- the EICAS advisory message ______________________ is displayed

Answer 6

In flight, pushing the CARGO FIRE DISCHARGE switch also activates the extinguishing system.

On the ground, if a CARGO FIRE DISCHARGE switch is pushed, three extinguisher bottles discharge simultaneously into the selected compartment, with
the third bottle discharging at a reduced flow rate.

When cargo fire extinguisher bottle discharge is initiated and the first two extinguisher bottles begin to discharge:
- the CARGO FIRE DISCHARGE switch light illuminates
- the EICAS advisory message BOTTLE DISCH CARGO is displayed