Engine Start – Max Temp?

Engine Start – Max Temp?

• A. 800°C
• B. 815°C
• C. 830°C
• D. 850°C

Answer: (B)

During an engine start, a defined temperature limit is set to protect the turbine from thermal damage during the transient start. For this engine, the published maximum ITT (Inter-Turbine Temperature) allowed during start is 815°C. This value is a balanced limit: high enough to allow a reliable start, but low enough to prevent excessive thermal stress if the start is abnormal or fuel is introduced too aggressively. The other temperatures listed would exceed the start-limit threshold and could risk damage or an abnormal start. If ITT approaches 815°C, the crew monitors for stabilization to idle and would abort the start if it cannot be kept within limits. So, 815°C is the correct maximum start temperature.

During an engine start, a defined temperature limit is set to protect the turbine from thermal damage during the transient start. For this engine, the published maximum ITT (Inter-Turbine Temperature) allowed during start is 815°C. This value is a balanced limit: high enough to allow a reliable start, but low enough to prevent excessive thermal stress if the start is abnormal or fuel is introduced too aggressively. The other temperatures listed would exceed the start-limit threshold and could risk damage or an abnormal start. If ITT approaches 815°C, the crew monitors for stabilization to idle and would abort the start if it cannot be kept within limits. So, 815°C is the correct maximum start temperature.