What occurs when there is an abnormal rise in ITT during a start attempt?

An abnormal rise in Interstage Turbine Temperature (ITT) during a start attempt is indicative of an engine malfunction. This spike in temperature suggests that something is not functioning properly within the engine system, which can lead to issues such as insufficient fuel flow, igniter problems, or mechanical failures. Monitoring ITT is crucial during engine starts, as excessive temperatures can cause damage to the engine components and compromise safety.

In contrast, a successful start typically would not display an abnormal rise in ITT; thus, it cannot be associated with a successful start. An intentional shutdown would not lead to elevated temperatures during the start attempt, as this situation usually involves a controlled cessation of operations. Also, the confirmation of stability in operation would mean that the engine is functioning within normal parameters, which is not the case when an abnormal rise in ITT is observed. Hence, the clear link between an abnormal ITT rise and potential engine malfunction is why this option is the correct choice.