Frequently Asked Questions

Navigation Databases


Why does my Flight Management System (FMS) show the old Navigation Database and expiration date after loading the new Navigation Database?

Most FMS Software Control Numbers (SCN) 60X / 70X and later have dual Navigation Database memory locations - to hold current (active) and past / future (inactive) Navigation Databases. If you are loading the Navigation Database that has a future effective date (or a past expiration date), it is loaded into the FMS's "Inactive" memory. The FMS automatically activates this new Navigation Database the first time the FMS is powered on after 0901Z (default configuration) on the effective date.