VOR Check Log (91.171)
Never miss the deadline: track vor check (91.171) dates per aircraft with calendar-correct warnings.
91.171: VOR equipment checked within the preceding 30 days for IFR use, with the date, place, bearing error and signature logged.
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 vor check log (91.171) for IFR pilots using VOR: per-aircraft due dates with the calendar-month math done right and badges before anything lapses. this is the only recurring check the PILOT must log personally.
About VOR Check Log (91.171)
Some inspection rules are subtle; this one is mostly arithmetic with a trap in it: 91.171: VOR equipment checked within the preceding 30 days for IFR use, with the date, place, bearing error and signature logged. And the trap — this is the only recurring check the pilot must log personally — and the required record (date, place, error, signature) is specified in the rule — catches IFR pilots using VOR 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 VOR Check Log (91.171)
- 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 VOR Check Log (91.171)?
- ✓Implements the actual rule: 91.171
- ✓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?+
91.171: VOR equipment checked within the preceding 30 days for IFR use, with the date, place, bearing error and signature logged. The detail that catches IFR pilots using VOR: this is the only recurring check the PILOT must log personally — and the required record (date, place, error, signature) is specified in the rule. 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 VOR equipment may not be used for IFR navigation until checked — which can make a filed flight illegal even though the aircraft is otherwise airworthy. The check takes minutes (a VOT, a designated checkpoint or a dual cross-check) and the rule specifies the record: date, place, bearing error and signature. A 7-day amber here keeps the 30-day clock from ever surprising you.
Where is this data stored?+
Everything you enter is saved in your browser's local storage on your own device — nothing is uploaded to any server. Your records stay completely private, work offline, and load instantly. Use the CSV export regularly to keep an off-device backup copy.
Can I get my data out if I switch systems later?+
Always — the CSV export is a complete, lossless dump of your inspection schedule, 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.
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