Guide

How to read Amend: what the labels mean, where remarks come from, and how FAA cycles work.

Priority

ACTChanges how you fly there. Tower or Class D hours, frequencies, runways closed, renumbered or restricted, navaids removed or changed, an approach removed with nothing in its place, new PPR or noise rules.e.g. Tower hours changed: 0700-2100 → 0700-0100 local

IFRInstrument procedures: approaches amended, added or replaced, STARs and departures, preferred IFR routes. Matters most if you fly IFR there.e.g. Approach ILS OR LOC RWY 04R amended (AMDT 11C)

FYIWorth knowing, rarely changes your flight: phone numbers, landing fees, obstacle and marking updates, name changes, reworded remarks.e.g. Airport phone number changed

No changeNothing changed at this airport between the two cycles.

Changes are listed ACT first, then IFR, then FYI, so the ones that matter are always at the top.

Reading a change

Changes read old → new. Tower hours: 0700-2100 → 0700-0100 local means it was 0700-2100 and becomes 0700-0100.

FAA text opens the original remark the FAA published. Details shows every field that changed. View plate opens the new approach or procedure chart, and the Amdt 3 chip is its amendment number (Original means a brand new procedure).

Remarks

Remarks are the free-text notes in the FAA Chart Supplement (the old A/FD) for an airport: things like PPR requirements, runway restrictions, wildlife, noise abatement, when services aren't available.

The FAA writes them in contractions (RSCD NOT MNT 2300-0600 M-F). Amend translates them to plain English with AI, using only the meanings in the FAA's own lists; unknown abbreviations are left as-is instead of guessed. A translation that doesn't pass Amend's checks is thrown out, and the FAA text shows instead. Open FAA text on any remark to see the original, and trust the original if they ever disagree.

Cycles

The FAA publishes airport and airspace data every 28 days (NASR) and instrument charts on the same schedule (d-TPP). Each cycle has an effective date and switches over at 0901Z that day.

UpcomingThe next cycle is already published but not in effect yet, so you can see changes before they happen. Until then the value before the → is the one that applies. Great time to check your airports.

In effectThe newest cycle is active. Shows what changed compared to the one before it.

Add the cycle dates to your calendar to get a reminder before each changeover.

History goes back to Aug 2024 for airport data. Chart history starts in July 2026 because the FAA doesn't keep old chart indexes online.

Lists

Search for an airport on the home page and tap + to add it to a list, or use + Add to list on any airport page. Lists are saved in this browser (no account needed). Make as many as you like, say one for your home area and one for a trip, and switch between them on the home page or the Lists page. View all changes shows the changes at every airport on a list, action items first.

Changes you haven't seen yet get a New label, based on the last time you opened that airport or list in this browser. The home page shows what's coming up at all your airports and counts down to the 0901Z changeover.

Copy share link gives you one link for a whole list, handy for a flight school or a training area. Anyone who opens it sees the same airports and can save the list as their own.

Show the welcome again ›

FAA cycle 26 Nov 2026 (upcoming) · updated 12 Nov 2108Z. Not for navigation. Amend can be wrong, late or incomplete, and a change that isn't shown here can still be real. Always use official FAA publications, NOTAMs and a proper preflight briefing. Amend is independent and not affiliated with the FAA. Data: FAA NASR and d-TPP. How it works · Status · Changelog · Privacy · Terms · Report a problem