What should be done if both cowl anti-ice and continuous ignition are required at the same time?

When operating the CRJ 900, it is important to follow specific procedures when using cowl anti-ice and continuous ignition, especially in conditions where ice formation is possible. Cowl anti-ice is critical for preventing ice accumulation on engine inlets, while continuous ignition is vital for ensuring engine stability during flight in potentially hazardous weather.

Selecting cowl anti-ice prior to engaging continuous ignition is the recommended approach. This sequence is vital because cowl anti-ice systems may require additional power and resources, and ensuring they are fully operational before activating continuous ignition allows for optimal engine performance and safety. This order guarantees that the engines are protected against ice, which is particularly crucial during approaches or when encountering icing conditions.

This response aligns with operational safety protocols and ensures that systems are activated in a way that maximizes efficiency and readiness, reinforcing effective safety measures during critical phases of flight.