What should be done with the electrical circuits in the event of smoke in the flight deck?

Isolating the relevant electrical circuits in the event of smoke in the flight deck is critical for ensuring safety and preventing further complications. When smoke is detected, isolating electrical circuits can help eliminate potential sources of ignition and minimize the risk of fire spreading or escalating. This action is part of the standard emergency procedure to maintain control over the situation.

Turning off all electrical devices, switching to battery power, or leaving the circuits on for monitoring may not be the safest measures. Turning off all electrical devices could impact essential systems necessary for aircraft operation, while switching to battery power can lead to further complications if not done carefully. Leaving circuits on for continuous monitoring poses unnecessary risks, especially if smoke indicates a more serious underlying problem. Therefore, focusing on isolating the relevant circuits is a precise, effective response in a smoke situation, allowing other safety protocols to be implemented more effectively.