How should AFFF be applied after an aircraft fire is extinguished?

• A. Applied once to the burning area
• B. Used only to cool the aircraft
• C. Contained for at least 10 minutes
• D. Contained for a minimum of 15 minutes

Answer: (D)

Applying Aqueous Film Forming Foam (AFFF) after extinguishing an aircraft fire is crucial for ensuring that any remaining hot spots are adequately cooled and that there is no potential for re-ignition. The correct response emphasizes that AFFF should be applied for a minimum of 15 minutes after the fire has been extinguished.

This duration is necessary because even after the visible flames are out, residual heat can remain in various aircraft components and surrounding areas. This heat can lead to a flare-up if not sufficiently cooled. The application of AFFF for this extended period not only helps to lower the temperature of hot spots but also creates a protective blanket over the area, preventing the combustion of any residual flammable materials that might still be present.

By ensuring that AFFF is applied continuously for the specified time, firefighters can better manage the risk of re-ignition, making the situation safer for both the crew involved and any subsequent firefighting operations.