What does the AFT CARGO SMOKE PUSH do?

• A. Arms both bottles to the aft cargo bay; closes both intake and exhaust SOVs and turns off the heater
• B. Disarms all fire suppression bottles
• C. Closes the cabin smoke valve
• D. Activates the forward cargo cooling fan

Answer: (A)

The AFT CARGO SMOKE PUSH is used to prepare and isolate the aft cargo bay for fire suppression. It arms both fire bottles so they’re ready to discharge into the aft cargo area if needed. It then closes both the intake and exhaust SOVs to prevent air from circulating into or out of that bay, helping to contain smoke and direct the extinguishing action where it’s required. Finally, it turns off the heater, reducing airflow and heat in the bay to further limit smoke and potential ignition. This sequence ensures the aft cargo bay can be suppressed effectively if a fire or smoke condition is detected, without affecting other zones.