Turboprop AD Compliance Tracker

At least four: calendar months, airframe hours, engine hours/cycles, and propeller hours — and a single aircraft's AD list typically uses all of them. The classic miss is a propeller hub AD keyed to prop hours after overhaul, which nobody's spreadsheet tracked. Logging each directive with its own due basis (date or hours, as this tracker allows) keeps the four clocks separately honest.

A one-time AD is history once signed off; a repetitive directive is a living deadline that regenerates at every compliance. Track repetitive items with their interval logic — the next-due date or hour figure updated at each sign-off — and keep them on the board forever. This tracker's repetitive-items counter exists because those entries, not the one-time ones, are where airworthiness quietly lapses.

The aircraft is unairworthy as a matter of law until compliance — insurance may be void, and flight (except under a ferry permit specifically issued for the purpose) is illegal. The cure is compliance plus a proper maintenance record entry. The practical defence is never reaching that state: a 30-day amber warning against a reconciled list is dramatically cheaper than a ferry permit and a sheepish call to your insurer.

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.

Always — the CSV export is a complete, lossless dump of your AD compliance list, generated locally in one click. Import it into commercial software, archive it with your files, or post-process it in a spreadsheet. No lock-in is deliberate: data you can't take with you isn't really yours.