When should a pilot intervene during engine starts according to FADEC guidance?

When should a pilot intervene during engine starts according to FADEC guidance?

• A. During Abnormal Start
• B. Only after FADEC indicates exceedance
• C. Never intervene
• D. Only during Normal Start

Answer: (A)

FADEC handles the start automatically when everything is normal, but you must intervene as soon as the start becomes abnormal. Abnormal Start means the indicators aren’t following the expected sequence—things like no light-off, unusual N1/N2 progression, surges, or abnormal temperatures, or the starter duty cycle being exceeded. In these cases, the automation may not resolve the issue safely, so you apply the abnormal-start procedures (abort the start or take the prescribed manual actions) to protect the engine. Waiting for an explicit exceedance signal from FADEC is not the right moment to act, because abnormal conditions can threaten engine health well before that threshold. During a normal start, FADEC can complete the sequence without intervention, but you still monitor and be ready to intervene if anything deviates.

FADEC handles the start automatically when everything is normal, but you must intervene as soon as the start becomes abnormal. Abnormal Start means the indicators aren’t following the expected sequence—things like no light-off, unusual N1/N2 progression, surges, or abnormal temperatures, or the starter duty cycle being exceeded. In these cases, the automation may not resolve the issue safely, so you apply the abnormal-start procedures (abort the start or take the prescribed manual actions) to protect the engine. Waiting for an explicit exceedance signal from FADEC is not the right moment to act, because abnormal conditions can threaten engine health well before that threshold. During a normal start, FADEC can complete the sequence without intervention, but you still monitor and be ready to intervene if anything deviates.