Whats Functional When Obsolete?

There arent many legal absolutes about expired data. But will the boxes keep working as expected?Using Garmin as the benchmark, the navigator will continue to work with obsolete data. Flying GPS approaches with an expired navigator database is a legal no-no, but practically speaking, most boxes will let you do it. We wouldnt make a habit of it, but if that LPV is the approach you really need and youre willing to defend your actions under emergency authority, it can be done. Youll want to carefully check every waypoint on the GPS database against a current chart. You may want to double-check with ATC that you have any NOTAMs or changes for that approach as well.

Key Takeaways:

• GPS navigators with expired databases generally remain functional, even allowing approaches, though this is legally discouraged and requires extensive manual verification against current charts and ATC.
• MFDs and dedicated charting devices enforce currency for critical data like approach charts, often preventing their display if the data is too far out of date.
• Most other MFD data, such as terrain and obstacle warnings, along with portable devices, will continue to function even if years out of date, albeit with increasing inaccuracy.
• It is recommended to keep at least one GPS database current, as differing database versions between devices can lead to functionality issues like disabled flight plan cross-fill.

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