What action is taken if a bleed air leak is detected?

When a bleed air leak is detected, the correct action taken is to shut down the respective system. Bleed air is critical for various aircraft systems, including environmental control, engine performance, and anti-icing systems. When a leak occurs, it compromises the efficiency and safety of these systems, as pressurized air is lost, potentially leading to systems failing to operate as intended. Shutting down the affected system is necessary to prevent further complications, such as loss of cabin pressure or overheating.

This action prioritizes the safety of the aircraft and its occupants by isolating the issue and mitigating any possible risks associated with the leak. In contrast, adjusting engine parameters, sending alerts to the cockpit, or making flight control adjustments would not directly address the root cause of a bleed air leak and could potentially complicate the situation further, rather than resolving the immediate issue presented by the leak.

Overall, shutting down the respective system is the most effective and immediate response to ensure safety and operational integrity.