A pilot should abort a start if the ITT rapidly accelerates through ______ degrees Celsius.

• A. 770
• B. 970
• C. 870
• D. 850

Answer: (C)

The correct temperature at which a pilot should abort a start is 870 degrees Celsius. This threshold is crucial because an ITT (Inter Turbine Temperature) that rapidly accelerates through 870 degrees can indicate an abnormal condition during engine start, such as a malfunction or incorrect fuel mixture leading to the potential for an engine over-temperature.

Aborting the start at this temperature helps to prevent damage to the engine and ensures safety, as exceeding this limit can lead to critical engine failure or significant wear on components. It is a standard safety protocol in turbine engine operations, ensuring that pilots maintain control over the engine’s parameters during start-up and react effectively to any unusual readings.