AOG Downtime Cost Calculator

For revenue aircraft: average daily billings over the trailing month (charter revenue, instructional rentals, tour seats), minus only the costs that genuinely stop (fuel). For private/business use, price the disruption honestly — airline tickets bought, meetings missed, the trip that didn't happen. Zero is almost never the true number, and using zero is how operations talk themselves into week-long groundings to save a freight bill.

Whenever its premium is less than the days it saves times your per-day burn — which at any meaningful utilisation is almost always. A $700 overnight premium against a $2,500/day burn pays for itself in seven hours of saved downtime. The calculator's per-day output exists to make this a ten-second check; operations that run it stop having the freight argument entirely.

Price one prevented event: if a $4,000 starter-generator on the shelf converts a three-day AOG into a two-hour swap even once, it returned multiples of its carrying cost. List your historical AOG causes, price each at your per-day burn, and the rational spares list writes itself — usually ignition, fuel-system and landing-gear consumables first. The same math funds maintenance forecasting tools and tracking discipline.

By design: operational records are sensitive, and the simplest privacy guarantee is never transmitting them. Local-only storage means zero servers, zero breach surface and zero subscription. If you work from several devices, keep one as the master record and move snapshots with the CSV export.

Yes — one click exports your complete AOG analysis 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.