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A Date With AIRAC

Maybe were too busy focusing on the forest and the trees that the dirt making up the foundation of the arbors is ignored. Or perhaps its the elephant in the room no one discusses. Instructors dont teach it because they dont understand the opaque system themselves-cant teach something you dont know. Whatever the cause, many pilots have a poor understanding of how aeronautical information travels through the system and how charts are updated.

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Key Takeaways:

  • Aeronautical Information Regulation And Control (AIRAC) is an internationally agreed-upon 28-day cycle, based on ICAO Annex 15, which standardizes and coordinates how countries publish updates to critical aeronautical information.
  • Understanding AIRAC, especially the "effective date," is vital for instrument pilots, as this date dictates when major aeronautical changes (like instrument procedures) are officially implemented and when all related navigation charts and databases should be updated for safety and legal compliance.
  • Charts may be updated without an effective date for minor changes (e.g., visual aids, cartography), but charts with an effective date incorporate critical 14 CFR Part 97 procedure changes and must only be used on or after that specific date; pilots are strongly advised to update all aeronautical information by the AIRAC effective date to ensure they have current data.
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Maybe we’re too busy focusing on the forest and the trees that the dirt making up the foundation of the arbors is ignored. Or perhaps it’s the elephant in the room no one discusses. Instructors don’t teach it because they don’t understand the opaque system themselves—can’t teach something you don’t know. Whatever the cause, many pilots have a poor understanding of how aeronautical information travels through the system and how charts are updated.

Why fend off paper cuts every few weeks or get the notice to update your data every time you fire up your electronic flight bag? Why are Jepps updated every two weeks while government charts update at four weeks? What about databases? Why do some charts have effective dates and other don’t?

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