Study Guide: Fire Protection

Question 1

757/767: The forward and aft cargo compartments are equipped with:

Answer 1

Dual smoke detectors

Question 2

757/767: The main gear wheel well has fire detection and warning only. There is no fire
extinguishing system. The main wheel well (WHL WELL) fire detection system is tested:

Answer 2

When the wheel well (WHL WELL) fire/overheat test switch is pressed and held

Question 3

757/767: Aside from airplane initial power-up, when are the cargo compartment smoke detectors tested?

Answer 3

When manually tested by pressing and holding the ENG/APU/CARGO button

Question 4

757/767: When an engine fire warning is received, one way this is indicated is by:

Answer 4

The fire bell sounding

Question 5

757/767: When an APU fire is detected, the handle is electrically unlocked and may then be pulled out. If the handle fails to electrically unlock, what action is required by the crew?

Answer 5

Push the fire override switch located beneath the fire handle

Question 6

757/767: When one of the fire extinguisher bottles is discharged or has low pressure, this is indicated by:

Answer 6

Associated DISCH light illuminating and EICAS message displaying

Question 7

757/763: The discrete FIRE warning light illuminates when an engine, APU, wheel well, or cargo fire is detected. When does the light extinguish?

Answer 7

When the fire signal no longer exists

Question 8

757/767: The FWD cargo ARMED switch, when pushed, will have what impact on air distribution?

Answer 8

Turns off both recirculation fans

Question 9

752: According to the graphic, pushing the number 1 cargo fire bottle (1-BTL) discharge switch will cause what to occur?

Answer 9

Discharges the number 1 bottle into the armed compartment

Question 10

757/767: Fire extinguisher bottles are installed for cargo compartment fire extinguishing. The protection time for either compartment is:

Answer 10

195 minutes

Question 11

757/767: Each respective fire detection system contains how many sensors (loops or detectors)?

Answer 11

Engines and APU: 2 loops each; Wheel Well: 1 loop;
Both Cargo Compartments:
2 smoke detectors each

Question 12

752/763: According to the graphic, is there any action required if this STATUS message appears?

Answer 12

Yes, perform the QRH procedure

Question 13

757: In the event of a dual APU fire loop failure, what indication(s) will be available to the crew?

Answer 13

EICAS advisory FIRE/OVHT SYS, two status messages, and the FAIL P-RESET light will illuminate on the fire/overheat test panel

Question 14

767: The AFT cargo ARMED switch, when pushed, will have what impact on the air distribution system?

Answer 14

Inhibits high flow on both packs

Question 15

757/767: According to the graphic, the FAIL P-RESET light is illuminated. What could be the cause for its illumination?

Answer 15

Dual smoke detector failure in a single cargo compartment

Question 16

757/767: Once a fire warning light or EICAS message has illuminated, it will only extinguish:

Answer 16

Once the fire signal no longer exists

Question 17

757/767: When do any of ENG, CARGO, or APU BTL DISCH lights illuminate?

Answer 17

When the associated extinguisher bottle is discharged or has low pressure

Question 18

753/767: The single BTL DISCH switch, when pushed, immediately discharges Bottle 1 into the ARMED cargo compartment and:

Answer 18

Initiates an automatic fire bottle discharged sequence

Question 19

757: If a fault is detected in both engine fire loops, how will this be indicated?

Answer 19

By an engine fire indication with appropriate EICAS messages