What triggers a flight plan re-file in Latitude operations?

• A. No changes needed after filing.
• B. Re-file should occur only if you reach cruise altitude.
• C. Significant weather changes, airspace restrictions, or route changes requiring new clearance or fuel calculations.
• D. Re-file is required only when fuel is below minimum.

Answer: (C)

A flight plan re-file is required whenever something significant changes that could affect the clearance, routing, or fuel calculations for the flight. In Latitude operations, the plan you filed is based on forecast weather, the expected route, and assumed fuel usage. If you encounter notable weather shifts, new airspace restrictions (like temporary restrictions or closures), or a route change to avoid weather or comply with ATC, those changes can alter the required fuel reserves and the clearance you’ll need. Re-filing updates the plan with current conditions so ATC has an accurate, approved plan and your fuel calculations stay compliant with regulations.

If nothing changes, there’s no need to re-file. Waiting until cruise altitude would miss mid-flight developments, since weather or airspace issues can arise at any point. Re-filing only when fuel drops below minimum is too limited a trigger, because significant changes can occur well before that threshold and still require a new clearance or updated fuel planning.