Which method is NOT used for filing an IFR flight plan?

Filing an IFR flight plan is an essential part of aviation operations, and various methods are available for pilots to accomplish this task. The correct answer identifies text messaging as a method that is not used for filing an IFR flight plan.

Text messaging does not provide the necessary format or security that is required for filing an IFR flight plan. IFR flight plans require specified information that must be accurately conveyed to authorities, including routing, navigation, and other critical data. Text messaging lacks the required standardization and official processing that other methods offer.

In contrast, options such as ForeFlight, 1800WXBRIEF, and FSS (Flight Service Station) are established tools that allow pilots to file IFR flight plans efficiently and correctly. Each of these methods is equipped to handle the necessary regulatory requirements and provide proper confirmation to the pilot once the flight plan is filed.

Using established platforms ensures that the flight plan reaches the appropriate aviation authorities, thus enhancing safety and coordination in the airspace system.