What is the procedure for extinguishing an induction system fire during engine start?

The procedure for extinguishing an induction system fire during engine start prioritizes safety and effective emergency response. Having a fireguard with a CO2 extinguisher on standby is critical because a CO2 extinguisher is specifically designed to smother fires that arise from flammable liquids and can extinguish an engine or induction system fire by displacing oxygen and cooling the flames.

This procedure allows for immediate response in the event of a fire without putting anyone at unnecessary risk by trying to actively extinguish the flames without proper equipment. Moreover, fires that occur during engine starts can escalate quickly, and a prepared fireguard can act swiftly to minimize damage and ensure personnel safety. This choice reflects the best practices established in aviation safety protocols, emphasizing readiness and precaution.

The other options do not promote safe or effective practices in the face of a potential fire hazard. For instance, applying water may not be effective on oil-based fires and can even exacerbate the situation, while discontinuing the engine start without further readiness may result in a lack of response to an escalating fire. Similarly, proceeding to start the engine despite a fire is clearly dangerous and would likely lead to more catastrophic results.