When both JAN APCH and MLU APCH lack FDIO, what action regarding “cleared as filed” is taken?

When both JAN APCH and MLU APCH lack FDIO (Flight Data Input/Output), the phrase "cleared as filed" cannot be utilized. The reasoning behind this relates to the practical aspects of communication and data handling in air traffic control.

Without FDIO, essential flight data and clearance information cannot be transmitted electronically between the air traffic control facilities and pilots. This situation creates a reliance on voice communication and manual note-taking, which heightens the chances of miscommunication or errors. Therefore, controllers cannot assume the clearance received by the pilot is accurate or consistent with what was "cleared as filed," which is why it may not be used in this scenario. Ensuring safety and clear communication is paramount, which is why the option to rely on "cleared as filed" is restricted under these conditions.