What type of technical directive communicates urgent repair needs affecting safety?

The correct answer is Urgent Action, as this type of technical directive is specifically designed to address critical repair needs that have an immediate impact on safety. Urgent Action directives are issued to ensure that necessary actions are taken quickly to mitigate risks that could endanger personnel, equipment, or missions. They usually contain detailed instructions on what repairs or modifications are necessary to maintain safety and operational effectiveness.

In contrast, options like Interim, Bulletin, and Formal Change serve different purposes. An Interim directive typically addresses temporary measures until a more comprehensive solution can be developed but may not always focus solely on urgent safety issues. Bulletins often provide updates or information but may not demand immediate action. Formal Changes are generally more systematic and detail longer-term adjustments or revisions to existing procedures or systems. Thus, the focus of the Urgent Action directive on urgent, safety-related repairs distinguishes it as the correct choice in a scenario concerning immediate safety concerns.