FAR 117 Cumulative Limits Tracker
Log duties and watch every rolling window FAA enforces — 100 flight hours in any 672 consecutive hours (28 days) and the rest, computed live.
Caps tracked: 100 flight hours in any 672 consecutive hours (28 days), 1,000 in any 365; 60 FDP hours in 168 (7 days), 190 in 672.
No entries yet — add your first one above. Data stays in your browser.
⚠️ Not for operational decisions. This is a record-keeping and planning aid only — not certified avionics, not a source of regulatory truth. Always verify against official sources (FAA) and your operator's approved documents before flying.
Free far 117 cumulative limits tracker: log each duty once and every rolling window recomputes live — 100 flight hours in any 672 consecutive hours (28 days), 1,000 in any 365 — the personal cross-check on crew scheduling's arithmetic.
About FAR 117 Cumulative Limits Tracker
FAA enforces its cumulative fences over rolling windows, not calendar months: 100 flight hours in any 672 consecutive hours (28 days), 1,000 in any 365; 60 FDP hours in 168 (7 days), 190 in 672. The distinction is the trap — a roster legal in each calendar month can contain an illegal rolling slice. This tracker is the personal layer of the joint-responsibility design: thirty seconds per duty, every window recomputed at every glance, CSV export when the question gets formal. Scheduling departments run the same math; the crews who can verify it are the ones the system was designed around.
How to use FAR 117 Cumulative Limits Tracker
- 1Log each duty: date, duty/FDP hours, block hours, sectors.
- 2Glance at the rolling tiles before accepting extensions or open time.
- 3Export the record when fatigue calls or disputes need numbers.
Why use FAR 117 Cumulative Limits Tracker?
- ✓Every FAA rolling window live: 100 flight hours in any 672 consecutive hours (28 days), 1,000 in any 365
- ✓Rolling-window arithmetic — the math memory can't do
- ✓Duty and block hours tracked separately (both fences matter)
- ✓The personal cross-check on crew scheduling's computations
- ✓CSV export for fatigue reports, disputes and records
Frequently asked questions
How do FAR 117's rolling cumulative limits work?+
Continuously, not by calendar: 117.23 caps flight time at 100 hours in ANY 672 consecutive hours and 1,000 in any 365 consecutive days, and FDP at 60 hours in any 168 consecutive hours and 190 in any 672. 'Any' is the operative word — the window slides hour by hour, so a legal month can contain an illegal 28-day slice. Crew systems compute this constantly; this tracker's rolling tiles do the same arithmetic from your logged duties, which is exactly the cross-check union contracts encourage.
Why keep a personal duty record when the company tracks it?+
Because joint responsibility is the regulatory design: limits bind the crew member as much as the operator, scheduling systems do err (data entry, delayed-block corrections, mid-month transfers), and the pilot who can show their own rolling numbers wins every version of the conversation — the open-time offer that would bust 28 days, the fatigue call that needs evidence, the interview asking for duty history. Thirty seconds per duty is what the cross-check costs.
Do I need an account or internet connection?+
No account and no connection are needed once the page has loaded — records live in local storage on your device and every calculation runs in your browser. Data doesn't sync between devices, so export the CSV when you want to move or archive your records.
How do I back up or print these records?+
Use the Export CSV button below the table: it downloads your full duty record as a spreadsheet-ready file. From there you can print a clean copy, archive it with your records folder, or import it into any other system. Exporting monthly is a good habit since the working data lives only in your browser.
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