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 generally continue to function with expired data, even allowing GPS approaches, though this is legally risky and requires meticulous manual verification against current charts.
• Multi-Function Displays (MFDs) and charting systems enforce stricter data currency, often disabling critical features like approach charts if the data is too old (e.g., 70-180 days expired).
• While some outdated data (like terrain or obstacle warnings) may still function, using expired databases leads to an increasingly inaccurate operational picture, making current updates crucial for safety and optimal functionality.

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