Which Halon agents are used in high-rate discharge bottles in jet transports?

• A. Halon 1211 or 1301.
• B. Halon 2402.
• C. CO2.
• D. Water.

Answer: (A)

High-rate discharge bottles on jet transports are designed to deliver a fast-acting extinguishing agent into a confined space to rapidly suppress a fire. Halons 1211 and 1301 are the agents used for this purpose because they provide quick flame knockdown with a high-density discharge and are compatible with aircraft installations and equipment. They’re effective for electrical and electronic fires and can be directed to the fire area or released as a targeted or total flooding application as needed.

CO2 and water are not suitable in this context: CO2 can displace the oxygen in occupied areas, posing a serious risk to crew and passengers, and water would damage sensitive avionics and electrical systems. Halon 2402 isn’t the standard choice for these high-rate, jet-transport bottle applications.