After a reportable aviation accident, what is the first step that should be taken?

The appropriate first step after a reportable aviation accident is to report to the Transportation Safety Board (TSB) via telephone. This is crucial because the TSB is responsible for investigating aviation accidents and incidents in order to enhance safety and prevent future occurrences. Prompt reporting ensures that the TSB can begin coordinating a thorough investigation, which may involve securing the accident site, gathering evidence, and collecting vital information from witnesses.

While notifying airport officials is important, it typically follows the initial reporting to the TSB, as they need to be informed immediately to initiate their investigative procedures. Leaving the accident site immediately does not contribute to safety or investigation efforts and could compromise evidence management. Starting an investigation without the involvement and oversight of the TSB may not adhere to regulatory protocols and could lead to incomplete or unauthorized investigations. Thus, the correct first action prioritizes the necessary reporting to the governing body responsible for aviation safety investigations.