15.1.8 Perform Fire Protection System Operations and Procedures

Question 1

What does the MAIN DECK cargo fire depressurization (DEPR) switch do?

Answer 1

• Shuts down right pack and commands other pack to low flow
• Gradually depressurizes airplane
• Closes the main deck trim air valve and other valves supplying air to the main cargo deck
• Silences the fire bell
• Inhibits master warning and aural warning for cabin altitude
• Opens the E/E smoke override valve
• Inhibits the lower FWD and AFT cargo smoke detection system
• Closes the compartment heat valves to the lower FWD, AFT and bulk cargo compartments

Question 2

The lower cargo fire extinguishing system is designed to provide effective concentration of extinguishing agent for how many minutes in total?

Answer 2

195 minutes

Question 3

What fire detection systems are automatically checked when electrical power is initially applied to the aircraft?

Answer 3

• Engine fire
• Engine overheat detectors
• APU fire detectors
• Cargo compartment smoke detectors

Question 4

Pulling the engine fire switch causes what to occur?

Answer 4

• Shuts off Fuel (engine and spar valves)
• Closes the pneumatic bleed air valve
• Trips the generator
• Shuts off hydraulic fluid to the EDP
• Arms both engine fire bottles

Question 5

Pushing the AFT CARGO FIRE ARMED switch will cause what to occur?

Answer 5

• AFT and bulk heat valves close
• Silences the fire bell
• Inhibits high flow for both packs
• Arms the cargo fire bottles

Question 6

A >L ENG OVHT< light on the aft aisle stand, and an EICAS caution message >L ENG OVHT< indicates what?

Answer 6

An overheat is detected in the left engine

Question 7

SYS FAIL P-RSET light on (aft aisle stand) indicates failure of the detectors in one of the following systems:

Answer 7

• Engine fire detection system
• Engine overheat detection system
• APU fire detection system
• Cargo fire detection system

Question 8

Pushing the FAIL P – RESET light:

Answer 8

Extinguishes the FAIL light and resets the monitor for other systems

Question 9

Do the wheel wells have single or dual loop detection for fires?

Answer 9

Single

Question 10

What will unlock an engine fire switch:

Answer 10

• Sensing an engine fire

- Manually unlocking the fire switch by pushing the fire override switch located beneath the fire switch