Which statement describes a Hung Start?

Which statement describes a Hung Start?

• A. No N2 increase after 5 seconds
• B. Engine Oil Pressure Warning Message
• C. No ITT increase after 25 seconds
• D. Hot Start

Answer: (A)

Hung Start occurs when ignition starts but the engine core doesn’t respond with rotation. In this case, there is no rise in N2 after a short window (about five seconds), meaning the core isn’t accelerating even though ignition is present. That lack of N2 increase is what identifies a hung start. The other conditions describe different start issues: an engine oil pressure warning is about lubrication, not the start sequence; no ITT increase after a long delay suggests ignition isn’t occurring or is severely delayed, not a hung start; and a hot start means ITT is too high even if the engine is attempting to accelerate, which is a different abnormal start scenario.

Hung Start occurs when ignition starts but the engine core doesn’t respond with rotation. In this case, there is no rise in N2 after a short window (about five seconds), meaning the core isn’t accelerating even though ignition is present. That lack of N2 increase is what identifies a hung start.

The other conditions describe different start issues: an engine oil pressure warning is about lubrication, not the start sequence; no ITT increase after a long delay suggests ignition isn’t occurring or is severely delayed, not a hung start; and a hot start means ITT is too high even if the engine is attempting to accelerate, which is a different abnormal start scenario.