ELT Inspection & Battery Tracker

91.207(d): ELT inspected within 12 calendar months; battery replaced after 1 hour cumulative use or at 50% of useful life. The detail that catches all certified aircraft: the battery clock and the inspection clock are independent — and the battery date is printed on the unit, not in most logbooks. Encode the real next-due date here at every sign-off — including the end-of-month or interval-deduction quirks — and the badge carries the arithmetic from then on.

The aircraft (or the affected operation) is grounded as a matter of law until the inspection is completed — and operating anyway risks certificate action and voided insurance. There's no grace period in the rule; the grace period is whatever warning buffer you build, which is exactly what the amber badge is.

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.

Yes — one click exports your complete inspection schedule as a CSV file that opens in Excel, Google Sheets or Numbers. The export preserves every column exactly as entered, so you can print it, attach it to paperwork, or hand it to an inspector, buyer or insurance underwriter as a supporting summary alongside your official records.