Fire Protection - Complete

Question 1

Where is the electrical power supplied from to power the Fire Detection

Answer 1

MAU 1 on DC ESS BUS 1

MAU 3 on DC ESS BUS 2

Question 2

With the batteries in the off position, is there fire detection available?

Answer 2

NO… only fire extinguishing

Question 3

Fire Extinguishing is supplied power from where?

Answer 3

HOT BATT BUS 1 AND HOT BATT BUS 2

Question 4

When the Fire Handles are pulled, what happens?

Answer 4

Commands the following shutoff valves to close:
Engine Fuel SOV
Engine Hydraulic SOV
Engine Bleed Air Valve and Bleed Cross Valve

Question 5

APU fire extinguishing is provided power by which bus?

Answer 5

DC ESS BUS 2

Question 6

If there is an APU fire detected on the ground, what happens?

Answer 6

The APU shuts down automatically 10 seconds after a fire is detected.

Question 7

APU fire detection is powered by which bus?

Answer 7

DC ESS BUS 1 via MAU 1 and DC ESS BUS 2 via MAU 3

Question 8

Pushing the APU button on the FIRE EXTINGUISHER panel accomplishes what?

Answer 8

Discharges the APU fire bottle
Shuts down the APU through the APU FADEC
Closes the APU fuel SOV
Displays and EICAS Advisory message APU FIREX BTL DISCH

Question 9

How many fire extinguisher bottles are installed for the APU

Answer 9

Only 1

Question 10

When does the APU fire extinguisher button illuminate?

Answer 10

When a fire is detected and after the APU EMER STOP button is pressed. If 1 minute elapses after a fire is detected and the APU EMER STOP is not pressed, the APU fire extinguisher button illuminates.

Question 11

How many smoke detectors in the forward cargo compartment?

Answer 11

3

Question 12

How many smoke detectors in the aft cargo compartment

Answer 12

2

Question 13

If smoke is detected in the forward cargo compartment, what does the system automatically accomplish?

Answer 13

Air circulation fans are turned off
High Rate fire extinguisher bottle armed
The forward cargo ventilation outflow valve is commanded closed

Question 14

If smoke is detected in the aft cargo compartment, what does the system automatically accomplish?

Answer 14

The high rate fire extinguishing bottle is armed

the AOM doesn’t say the fans are turned off

Question 15

How many cargo fire extinguishing bottles are there?

Answer 15

2- One high rate and one low rate. Both are in the center avionics bay and are used for EITHER the front or aft cargo compartment

Question 16

If both cargo fire extinguishing bottles are used in the front cargo compartment in the case of smoke, how is the rear cargo compartment protected against smoke / fire?

Answer 16

It isn’t… Only two bottles are available to be used for either the front or back. SOL… bad day

Question 17

After the cargo fire extinguisher high rate bottle is discharged, when does the low rate bottle discharge.

Answer 17

If in the air, one minute later it is automatically discharged.
If on the ground, the CARGO SMOKE FWD / AFT button must be pushed again. This is due to the variable of fire crews being present or not.

Question 18

If no EICAS message is present what does pushing the CARGO SMOKE FWD / AFT accomplish?

Answer 18

The high rate bottle is then armed.
The result is having to push it twice in the air and three times on the ground to accomplish the same without an EICAS message present

Question 19

The APU will automatically shut down during a fire test if the test button is pressed for _____ ??

Answer 19

10 seconds

Question 20

Complete

Answer 20

AOM complete