To override the smoke configuration, which fans should be selected?

To override the smoke configuration, which fans should be selected?

• A. Both the BLOWER and EXTRACT fans
• B. BLOWER only
• C. EXTRACT only
• D. None

Answer: (A)

Activating both the BLOWER and the EXTRACT fans creates a strong, bidirectional airflow that is essential to clear smoke quickly. The BLOWER supplies clean air to the cabin and cockpit, while the EXTRACT draws contaminated air out through the exhaust path. With both operating, air moves through the occupied spaces and out of the aircraft, diluting and removing smoke efficiently. If you only run one of them, you either push air in without removing the smoke, or remove air without supplying fresh air, which slows smoke clearance and can worsen the environment for the crew.

Activating both the BLOWER and the EXTRACT fans creates a strong, bidirectional airflow that is essential to clear smoke quickly. The BLOWER supplies clean air to the cabin and cockpit, while the EXTRACT draws contaminated air out through the exhaust path. With both operating, air moves through the occupied spaces and out of the aircraft, diluting and removing smoke efficiently. If you only run one of them, you either push air in without removing the smoke, or remove air without supplying fresh air, which slows smoke clearance and can worsen the environment for the crew.