What is defined as an unplanned event that results in no injury or damage under $50K?

The term that accurately describes an unplanned event resulting in no injury or damage under $50K is considered to be a "mishap." A mishap often refers to an unexpected occurrence, especially in contexts such as safety or operational procedures, and is typically distinguished from more severe incidents by its lack of significant consequences.

While "incident" can generally encompass various types of unexpected events, including those resulting in injury or substantial damage, it does not specifically convey the limitation to minor consequences. The term "accident" usually implies an event that leads to injury or significant damage, which is not the case in this situation. The word "event" is much broader and fails to capture the context of an unplanned occurrence leading to minor fallout. Thus, "mishap" is the most precise descriptor for the scenario given, as it succinctly indicates a minor, unintentional event with limited impact.