MEL Deferral Tracker
Structured discrepancy tracking for 135/121-style operations: report, status, disposition and dates — with open-item badges.
Every MEL deferral carries a category clock (A: as specified, B: 3 days, C: 10 days, D: 120 days) — and the clock starts at deferral, not discovery.
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 mel deferral tracker for 135/121-style operations: every discrepancy with severity, status and dates — open items impossible to lose. every MEL deferral carries a category clock (A: as specified, B: 3 days, C: 10 days, D: 120 days).
About MEL Deferral Tracker
Every MEL deferral carries a category clock (A: as specified, B: 3 days, C: 10 days, D: 120 days) — and the clock starts at deferral, not discovery. The cure is structural, not motivational: a single shared list where every observation lands with severity, status and dates, and where 'open' is a visible badge rather than a memory. That's this log. Write-ups take thirty seconds; the status field tracks each item to closure; the summary counts what's open and deferred so nothing ages into folklore. The export gives your mechanic a worked discrepancy history instead of a verbal handover.
How to use MEL Deferral Tracker
- 1Write up anything abnormal immediately — thirty seconds while it's fresh.
- 2Track status to closure; set target dates on deferred items.
- 3Review open items before flight and export the history for maintenance.
Why use MEL Deferral Tracker?
- ✓Severity + status + dates per item — nothing ages into folklore
- ✓Open/deferred counts always visible
- ✓MEL category clocks (B/C/D) tracked to their repair deadlines
- ✓Built for the failure mode of 135/121-style operations
- ✓CSV export = the discrepancy history your mechanic actually wants
Frequently asked questions
How do MEL deferral categories work?+
Category A items carry the interval specified in the MEL itself; B gives 3 consecutive calendar days; C gives 10; D gives 120 — excluding the day of deferral, which is the arithmetic detail that trips crews. The deferral must be placarded, recorded, and repaired within its window or the aircraft is no longer MEL-compliant. This tracker holds each open deferral with its computed expiry so the category clocks are watched by badges, not memory.
How detailed should a discrepancy entry be?+
Enough that a stranger could act on it: what, when noticed, conditions, and any pattern ('right fuel gauge reads zero for first 10 minutes, cold mornings only'). Severity and status make it actionable; the date makes it evidence. The one-line vague entry — 'radio weird' — costs more shop time than it saves writing time, which is the entire economics of doing this properly.
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 discrepancy history 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.
Related Aviation tools
FAA PPL Pilot Logbook
Free digital FAA pilot logbook for PPL holders — log flights, auto-total hours and watch 90-day recency, privately in your browser.
● LiveFAA CPL Pilot Logbook
Free digital FAA pilot logbook for CPL holders — log flights, auto-total hours and watch 90-day recency, privately in your browser.
● LiveFAA ATPL Pilot Logbook
Free digital FAA pilot logbook for ATPL holders — log flights, auto-total hours and watch 90-day recency, privately in your browser.
● Live