A class A and B mishap requires preliminary messages to be sent within how many hours of the on-duty mishap?

In the context of class A and B mishaps, the requirement to send preliminary messages within 24 hours is established to ensure timely communication and responsiveness regarding incidents that may have significant implications for safety, operations, or regulatory compliance. This 24-hour timeframe allows for the collection of initial facts and details about the mishap while still being fresh, facilitating a more accurate and effective response from investigation teams and management.

The protocol is designed to support accountability and prompt action, allowing organizations to begin their response processes quickly, investigate the events, and communicate necessary information to stakeholders while ensuring that any actions taken are based on the most current information available. This adherence to a 24-hour window reflects the importance of managing mishaps efficiently and transparently.