Per-aircraft-type MEL catalog plus per-tail deferral ledger. FAA categories auto-roll the deferral window (3 / 10 / 120 days for B/C/D), expired deferrals ground the aircraft, mechanics sign off with their cert number, and the audit log keeps the entire history. 14 CFR 91.213 + 121.628 + 135.179 ready.
B737-800, BE350, CRJ-200, etc. — entered once per fleet type, reused across every tail. Item-by-item entry today; no bulk/CSV import.
Each deferral inherits Category A/B/C/D from the catalog. Window auto-computes from deferred-at + category days.
Expired deferrals ground the aircraft. The /app/mel KPI strip + dispatch sheet surface them immediately.
Cert number, procedure compliance note, deferred-by user — all logged with timestamps.
Open deferrals roll into the dispatch sheet so the captain sees procedure-compliance items before taxi.
Catalog views grouped by aircraft type for ATA chapter scan + audit prep.
Yes — Category A has no calendar limit (specific conditions in the catalog), B is 3 days, C is 10 days, D is 120 days. The system auto-computes expiry from the deferral date + category. Note: those day-counts come from FAA MMEL policy guidance (Policy Letter 25 / Order 8900.1 Vol 4 Ch 4), not from the text of 14 CFR 91.213 itself — 91.213 sets the legal framework for operating with inoperative equipment but doesn't spell out the A/B/C/D day-counts.
Open deferrals past their expiry date trigger a red banner on /app/mel: the aircraft is no longer airworthy until the item is fixed (closed) or the deferral is voided with documented reason.
Not as a bulk import today — there's no CSV/file upload for the catalog. You add each catalog item (ATA chapter, item number, name, category, qty, procedures) one at a time through the catalog form, so a Boeing/Airbus MEL is entered item-by-item per fleet type, then maintained incrementally.
Any user with MAINTENANCE+ role can open a deferral; the form captures mechanic cert number alongside the user's identity. Audit log records actor + cert + procedure compliance for FAA inspection.
Yes — the dispatch sheet pulls in open deferrals for the assigned aircraft so the captain sees what's deferred + what procedures to apply before taxi.
Import your fleet MEL, deferral history, and run a side-by-side against your current tool.
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