Required ITT condition before ground start is?

Required ITT condition before ground start is?

• A. Below 120C
• B. Above 120C
• C. Between 120C and 140C
• D. Below 100C

Answer: (A)

Inter-Turbine Temperature must be below 120°C before a ground start. This temperature check ensures the engine is cool enough to prevent a hot start and reduce thermal stress on turbine components when the start sequence begins. If ITT is above 120°C, starting could push the engine into an unsafe condition, so you wait and let it fall. Values above that range (for example, in the hotter zone) are not acceptable, while requiring ITT below 100°C would be unnecessarily restrictive for normal operations.

Inter-Turbine Temperature must be below 120°C before a ground start. This temperature check ensures the engine is cool enough to prevent a hot start and reduce thermal stress on turbine components when the start sequence begins. If ITT is above 120°C, starting could push the engine into an unsafe condition, so you wait and let it fall. Values above that range (for example, in the hotter zone) are not acceptable, while requiring ITT below 100°C would be unnecessarily restrictive for normal operations.