At what ITT temperature must the thrust lever be moved from shut off to idle for all ground starts?

The correct answer, 120°C, is significant because it aligns with the operational limitations established for the CRJ 200's engine start procedures. When performing ground starts, it is crucial to follow the manufacturer’s recommendations to ensure the safety and efficiency of the engine starting process.

At an Inter-stage Turbine Temperature (ITT) of 120°C, the engine is in a favorable condition for starting, ensuring that there is adequate fuel and airflow to prevent a potential hot start or damage to the engine components. Moving the thrust lever beyond the shut-off position to idle at this temperature allows for a smooth transition into the start cycle without risking excessive heat generation that could lead to engine failure.

Starting the engine at temperatures below this threshold might lead to inadequate combustion conditions, while starting above could cause an over-temperature scenario, potentially damaging the engine. Therefore, maintaining awareness of the ITT limit of 120°C is essential for safe engine operation during ground starts.