The FADEC will automatically shut the engine down during start if TOT exceeds what temperature?

• A. 840 degrees C
• B. 700 degrees C
• C. 1000 degrees C
• D. 900 degrees C

Answer: (A)

During start, the FADEC watches the turbine outlet temperature (TOT) as a protective limit. If TOT climbs above a set threshold, fuel is automatically cut off and the engine is shut down to prevent overheating of the turbine blades and hot-section components while the engine is still accelerating from a standstill. For this helicopter’s engine during start, that automatic shutdown point is 840 degrees Celsius. Values like 700, 900, or 1000 degrees are not the permitted shutdown threshold for the start condition on this model; they may correspond to other operating limits, but not the start protection.