Fire

Question 1

What happens when either illuminated Master FIRE WARN light is pushed?

Answer 1

• extinguishes the FIRE WARN lights, and
• silences the Fire Warning Bell, and
• reset the system for future warnings, and
• (on the ground) silences the remote APU Fire Warning Horn

(Sec 8.010 p 2)

Question 2

Which other switch provides the same function as pushing either Master Fire Warn light for an engine fire warning?

Answer 2

Fire Warning BELL CUTOUT switch

Sec 8.010 p 2

Question 3

Which Bus power the Engine Overheat and Fire Detection? Which Bus powers the Engine Fire Extinguishing?

Answer 3

Detection: Battery Bus
Extinguishing: Hot Battery Bus

(Sec 8.010 p 3)

Question 4

What will cause an illuminated ENG OVERHEAT light and/or Engine Fire Switch to extinguish?

Answer 4

Temperature drops below the onset temperature

Sec 8.010 p 4

Question 5

With the OVHT DET switch in the A or B position, what initiates an overheat or fire warning?

Answer 5

In A or B, the system operates as a single loop system, the non-selected loop is not monitored

(Sec 8.010 p 4)

Question 6

With the OVHT DET switch selected to “A”, during an Overheat/Fire Test, what does a FAULT light (amber) indication mean?

Answer 6

The A loop has failed

Sec 8.010 p 4

Question 7

If one overheat/fire detector loop fails with the OVHT DET switch on NORMAL, how is a fire detected?

Answer 7

If one loop fails with OVHT DET switch in NORMAL, that loop is automatically deselected and the remaining loop functions as a single loop detector

(Sec 8.010 p 4)

Question 8

What does rotating an Engine Fire Switch do?

Answer 8

Electronically fires a squib, discharging the extinguishing agent into the related engine

(Sec 8.010 p 6)

Question 9

What causes a Fire Switch to unlock?

Answer 9

• A fire detected
• The Manual Override Switch

(Sec 8.010 p 7)

Question 10

Which Bus powers the APU Overheat and Fire Detection? Which Bus powers the APU Fire Extinguishing?

Answer 10

APU Fire Detection: Battery Bus
APU Fire Extinguishing: Hot Battery Bus

(Sec 8.010 p 8)

Question 11

What does pressing the HORN CUTOUT switch on the APU Fire Control Panel (main wheel well) do?

Answer 11

• silences the Fire Warning Bell
• silences the APU Fire Warning Horn
• causes the APU Fire Warning Light to stop flashing, but remains illuminated

(Sec 8.010 p 11)

Question 12

What power source is required for Main Wheel Well fire detection?

Answer 12

AC Power (No 2 AC Transfer Bus)

Sec 8.010 p 13

Question 13

What components are tested with the Overheat/Fire Protection Panel Test Switch to OVHT/FIRE?

Answer 13

APU Overheat and Fire Detection circuitry and related Flight Deck indications:

• Overheat
• Fire detection loops (both engines)
• APU
• Main wheel well

(Sec 8.010 p 14)

Question 14

What components are tested with the Overheat/Fire Protection Panel Test Switch to FAULT/INOP?

Answer 14

• Both MASTER CAUTION lights illuminate
• OVHT/DET system annunciator light illuminates
• FAULT light illuminates (failure means fault monitoring system INOP)
• APU DET INOP light illuminates

(Sec 8.010 p 14)

Question 15

What does a FAULT light (amber) illuminating during an OVHT FIRE test indicate?

Answer 15

A bad loop on an engine

Sec 8.010 p 15

Question 16

What does the ENGINES APU EXT/TEST switch test?

Answer 16

Pos 1: No 1 ENG squibs on L/R Fire Bottles and APU Fire Bottle
Pos 2: No 2 ENG squibs on L/R Fire Bottles and APU Fire Bottle

(Sec 8.010 p 15)

Question 17

What does a DETECTOR FAULT light (amber) illuminated indicate when TEST is pushed and held on the Boeing Cargo Fire Panel?

Answer 17

One or more detectors in the related loop(s) has failed

Sec 8.010 p 17

Question 18

When does the first bottle on the Boeing Lower Cargo Compartment Fire Suppression Dual Bottle system discharge? The second bottle?

Answer 18

First Bottle: when the DISCH switch is pushed after being armed (60 minutes timer)
Second Bottle: automatically discharged by the timer 195 minute protection

(Sec 8.010 p 18)