What does a hot start in an aircraft engine indicate?

A hot start in an aircraft engine refers to a situation where there is an excessive temperature rise during the start cycle of the engine. This typically occurs when fuel is injected into the combustion chamber too early or when there is insufficient airflow combined with a high-speed rotation of the engine. As a result, the excessive heat generated can lead to engine damage if not managed properly.

The correct answer emphasizes the importance of timing in fuel injection and operational conditions, such as tailwind, which can contribute to the risk of a hot start. In contrast, other responses do not accurately capture the relationship between fuel timing, airflow, and temperature management critical to preventing a hot start scenario. For example, adding fuel too late or having low engine temperatures does not align with the definition and implications of a hot start.