During an engine fire procedure, how long should you wait before discharging the 2nd agent bottle?

During an engine fire procedure, how long should you wait before discharging the 2nd agent bottle?

• A. Immediately
• B. Until the ECAM countdown is complete
• C. After engine shutdown
• D. After 10 seconds

Answer: (B)

Engine fire extinguishing is done in two stages. When you activate the engine fire pushbutton, the first extinguishing bottle is released to knock down the fire. The second bottle is timed by the ECAM system, so you wait for the ECAM countdown to finish before discharging the second bottle. This sequencing gives the first dose time to act and ensures the second discharge occurs only if the fire persists, maximizing effectiveness while avoiding unnecessary use of extinguishing agent. Discharging the second bottle before the countdown completes is not recommended, and waiting until engine shutdown or a fixed short interval isn’t how the procedure is designed to work.

Engine fire extinguishing is done in two stages. When you activate the engine fire pushbutton, the first extinguishing bottle is released to knock down the fire. The second bottle is timed by the ECAM system, so you wait for the ECAM countdown to finish before discharging the second bottle. This sequencing gives the first dose time to act and ensures the second discharge occurs only if the fire persists, maximizing effectiveness while avoiding unnecessary use of extinguishing agent. Discharging the second bottle before the countdown completes is not recommended, and waiting until engine shutdown or a fixed short interval isn’t how the procedure is designed to work.