100-Hour Inspection Scheduler
Never miss the deadline: track 100-hour inspection dates per aircraft with calendar-correct warnings.
91.409(b): aircraft carrying persons for hire or used for instruction for hire need a 100-hour inspection; the 10-hour overflight allowance exists only to REACH the inspection and the overage deducts from the next interval.
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 100-hour inspection scheduler for flight schools and commercial operators: per-aircraft due dates with the calendar-month math done right and badges before anything lapses. the 10-hour overflight is the most misunderstood allowance in Part 91.
About 100-Hour Inspection Scheduler
Some inspection rules are subtle; this one is mostly arithmetic with a trap in it: 91.409(b): aircraft carrying persons for hire or used for instruction for hire need a 100-hour inspection; the 10-hour overflight allowance exists only to REACH the inspection and the overage deducts from the next interval. And the trap — the 10-hour overflight is the most misunderstood allowance in part 91 — fly to 105 and the next inspection is due at 200, not 205 — catches flight schools and commercial operators every season. Keep the board current here: every item with last-done and next-due, colour badges doing the watching, CSV export for the maintenance folder. The five minutes per sign-off buys the absence of a very expensive surprise.
How to use 100-Hour Inspection Scheduler
- 1Add each aircraft's inspection items with last-done and next-due dates.
- 2Update the dates at every sign-off — thirty seconds, max.
- 3Schedule shop time when badges go amber; export the board for your records.
Why use 100-Hour Inspection Scheduler?
- ✓Implements the actual rule: 91.409(b)
- ✓Per-aircraft entries — fleets welcome
- ✓Amber warnings sized to real shop scheduling lead times
- ✓Next-due headline answers 'what bites first?' instantly
- ✓Private browser storage with CSV export
Frequently asked questions
What exactly does the rule behind this tracker require?+
91.409(b): aircraft carrying persons for hire or used for instruction for hire need a 100-hour inspection; the 10-hour overflight allowance exists only to REACH the inspection and the overage deducts from the next interval. The detail that catches flight schools and commercial operators: the 10-hour overflight is the most misunderstood allowance in Part 91 — fly to 105 and the next inspection is due at 200, not 205. 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.
What happens if this inspection lapses?+
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.
Why doesn't this tool sync to the cloud?+
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.
How do I back up or print these records?+
Use the Export CSV button below the table: it downloads your full inspection schedule 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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