What should be your first action if an induction fire occurs during the starting of a reciprocating engine?

In the event of an induction fire during the start of a reciprocating engine, continuing to crank the engine is typically the recommended course of action. This is because by cranking the engine, the airflow created can help to extinguish the fire by blowing out the flames from the induction system. This process is crucial as it allows the engine to draw in cooler air, which can help to eliminate the fire.

If the engine successfully starts, it may complete the combustion process and burn off any excess fuel that contributed to the fire. However, it is vital to keep an eye on the situation and be prepared to take further action if the fire does not go out.

Shutting down all electrical systems may not directly address an induction fire and could result in loss of engine controls. Evacuating the aircraft should be a last resort if the situation escalates and you are unable to manage the fire effectively. Using a fire extinguisher may be necessary in more extreme instances or once the engine is shut down. However, when the induction fire occurs during starting, continuing to crank is focused on the immediate actions necessary to resolve the situation.