A deferred action must be prepared using OPNAV Form 4790/2K if a problem arises with a piece of equipment that can't be repaired within how many days?

The correct answer is based on guidelines surrounding maintenance management within the Navy. A deferred action using OPNAV Form 4790/2K is required when a piece of equipment cannot be repaired within a specified time frame, which is set at 30 days.

This form serves as a means to document deficiencies in equipment and to track cases where repairs are necessary but cannot be completed in a timely fashion. Utilizing the 30-day threshold ensures that the necessary attention is given to prolonging the operational readiness and safety of naval equipment.

Understanding this timeframe is crucial for maintaining efficient operations and for managing the maintenance cycle effectively, allowing commands to plan and allocate resources appropriately for repairs.