Which statement about the AFT CARGO SMOKE PUSH is true?

• A. Arms both bottles to the aft cargo bay; closes both intake and exhaust SOVs and turns off the heater
• B. Arms a single bottle and leaves SOVs unchanged
• C. Disables all aft cargo detectors
• D. Turns on the aft cargo heater

Answer: (A)

Activating the aft cargo smoke push is about quickly isolating the aft cargo compartment and starting the extinguishing process. When you push it, you arm both extinguishing bottles so agent can be released into the aft cargo bay. At the same time, it closes both the intake and exhaust shutoff valves to seal off the bay from the rest of the aircraft, preventing contamination from or leakage into other areas. It also turns off the aft cargo heater to remove a heat source that could feed the fire and complicate the extinguishing effort. This combination makes the system effective at containing the fire and delivering the extinguishing agent where it’s needed. The other statements don’t align with how the system is designed to operate: arming only one bottle or leaving valves unchanged wouldn’t adequately isolate or extinguish; disabling detectors would remove vital fire warnings; and turning on the heater would worsen the situation.