What is defined as an event that interrupts normal flight operations?

An event that interrupts normal flight operations is best defined as reportable events. This term encompasses various occurrences that disrupt the intended operation of flights, including but not limited to emergencies and safety-related incidents that require official documentation or notification to regulatory authorities. Reportable events impact the safety and efficiency of air travel, making it necessary for operators to take corrective action and ensure compliance with aviation regulations.

In contrast, while emergency landings and flight delays are certainly interruptions, they are specific types of reportable events rather than the broad term that encompasses all such occurrences. Passenger complaints, while they can indicate issues with service or operations, do not typically fall under the definition of events that impact the actual flight operations and are, therefore, not considered interruptions in the same critical sense.