When flying through contaminated airspace, what will the air used for avionics cooling be?

When flying through contaminated airspace, the air used for avionics cooling will be contaminated. This is because avionics systems rely on the ambient air available in the environment to maintain their operational temperature. If the surrounding area is contaminated, such as by ash or other particulates, the cooling process also uses that same contaminated air.

It's important for pilots and crew to be aware that the systems will not be designed to purify or filter this air for cooling purposes while in flight. Instead, the aircraft may be equipped with procedures to mitigate any effects of contaminants on avionics, relying on proper maintenance and operational protocols to handle potential equipment degradation due to exposure. Using contaminated air emphasizes the significance of monitoring and managing the implications of flying in adverse atmospheric conditions.

The other options relate to methods or processes that would not accurately represent the aircraft's cooling air situation in such circumstances.