Part 121 · Reliability & reporting
Fleet utilization
Per-tail hours over 30 / 90 / 365 days sit next to an inspection countdown, so planners see which aircraft is overworked and which inspection is closest. It replaces the utilization tally done by hand each month.
Launching the first quarter of 2027.
Illustrative — every screen reflects your own data.
Who it's for
Fleet planners at a Part 121 operation who balance the fleet against its maintenance horizon and want rolling per-tail hours next to the inspection clock.
What it replaces
The per-tail utilization tally done by hand each month.
What fleet utilization gives you
- Per-tail hours over 30 / 90 / 365 days
- An inspection countdown alongside
- Which aircraft is overworked and which inspection is closest
Per-tail hours over 30 / 90 / 365 days
Each tail's flown hours roll up automatically over 30, 90, and 365 days, so the utilization picture is live rather than a hand tally done each month. A planner reads which aircraft is overworked straight off the row.
- Per-tail hours over 30 / 90 / 365 days
- Which aircraft is overworked and which inspection is closest
Rolling hours beside the inspection clock
The rolling hours sit next to an inspection countdown on the same row, so a planner reads which aircraft is overworked and which inspection is closest in one place. Putting the hours beside the inspection clock is what lets the fleet be balanced against its maintenance horizon rather than against memory.
- An inspection countdown alongside
- Per-tail hours over 30 / 90 / 365 days
How an operator uses this
Per-tail hours over 30, 90, and 365 days sit next to an inspection countdown on the same row, so a planner reads which aircraft is overworked and which inspection is closest in one place. Because the hours roll up automatically, the utilization picture isn't a tally done by hand each month. Putting the rolling hours beside the inspection clock is what lets a planner balance the fleet against its maintenance horizon rather than against memory.
Illustrative — every screen reflects what's in your own data, nothing more.
How it works
Fleet utilization, step by step
Each tail's flown hours roll up over 30, 90, and 365 days.
An inspection countdown sits alongside the hours on the same row.
Read which aircraft is overworked and which inspection is closest.
Balance the fleet against its maintenance horizon without a hand tally.
Questions
Fleet utilization — frequently asked
What utilization windows does it show per tail?
Hours over 30, 90, and 365 days, sitting next to an inspection countdown, so planners see which aircraft is overworked and which inspection is closest.
Do I have to tally utilization by hand each month?
No. Per-tail hours roll up automatically over 30 / 90 / 365 days, so the utilization picture is live rather than a monthly hand tally.
Keep exploring
Other features in Part 121
Monthly bid packages
Per base × equipment × position, DRAFT → OPEN → CLOSED → AWARDED → PUBLISHED.
Deep diveLINE + rule-based PBS
Seniority-ordered awards in either LINE or rule-based PBS mode.
Deep diveIdempotent award engine
A pure awards function — re-running replaces prior awards with the same result.
Deep diveCrew pairing builder
Per-line pairing CRUD inside each package, with a reserve-pool fallback.
Deep diveFAR 117 enforcement
Flight-time caps checked at crew-assignment time — a busting assignment is blocked before it saves.
Deep diveFAR 121.467 cabin-crew enforcer
Parallel duty/rest enforcement for flight attendants.
Deep diveUnion / CBA contract overlay
Layer your bargaining unit's stricter limits on top of the FAR floor; the scheduler enforces whichever is more restrictive.
Deep diveCrew duty board
Live duty used per crew member, derived from shifts and the flight log.
Deep diveFatigue risk board
Deterministic and explainable — blends documented duty load with self-reported sleep signals. Not an AI prediction model.
Deep diveReserve crew
LONG_CALL + SHORT_CALL with callout and no-contact tracking.
Deep diveOpen-time / trip trading
Drop / pickup / swap with planner approval; auto-approves when no FAR 117 bust.
Deep diveMEL — minimum equipment list
Category A/B/C/D deferrals with auto-rolling expiry; expired items ground the aircraft.
Deep diveAQP (14 CFR 121 App. Y)
Per-fleet proficiency objectives and CQ-cycle enrollments.
Deep diveFA recurrent training
121.421 initial / recurrent / transition / overwater on a 12-month cycle.
Deep diveRecurrent calendar
Four-month grid across credentials, FA recurrent, and inspections.
Deep diveDrug & alcohol random draws
Random-selection records with a full audit trail.
Deep diveAircraft program
ADs, SBs, and life-limited parts with inspection clocks per tail.
Deep diveCargo & ULD
IATA ULD types, an AC 120-85-styled inspection clock (non-mandatory FAA guidance), and hazmat tags on the build-up manifest.
Deep diveLive aircraft tracking
FlightAware position + ETA on the ops board (bring-your-own AeroAPI key).
Deep diveTrip-sheet briefings
METAR/TAF + NOTAMs + fuel + crew signature, print-ready; pax/cargo weight captured for your own W&B process.
Deep divePredictive maintenance
A 0–100 AOG-risk score per tail — deterministic and explainable, with the contributing factors shown.
Deep diveManager daily digest
Today's ops and attention items emailed to managers each morning.
Deep diveReports & exports
Utilization, currency, and completion KPIs with CSV export.
Deep divePilot dashboard
A pilot's own home: next flights + FAR 117 duty standing, report-for-duty check-in, PBS bid status, 61.51 logbook, currency and credentials.
Deep diveFlight-attendant dashboard
Trips and schedule, 14 CFR 121.421 recurrent-training status, credentials, check-in, manuals, and fatigue reporting.
Deep diveCrew planner & dispatch
Bid packages and awards, reserve and open-time, and the live ops / dispatch board for the people running the operation.
Deep diveManager & compliance
Fleet, recurrency, FAR 117 oversight, and audit-ready compliance — role-scoped, one Part at a time.
Deep diveMaintenance-station routing
Flags when a tail's due check won't reach a capable station before its limit. Advisory — it surfaces the risk, it doesn't block dispatch.
Deep diveCrew-base efficiency
Surfaces deadhead and out-of-base overnights so pairings can be built to originate and terminate at a crew member's base.
Deep diveWeighted efficiency score
A configurable weighted score (abstract points, lower = better) over deadhead, overnights, repositioning, and maintenance-fit slack — set your own weights.
Deep diveExplainable swap / re-base suggestions
Deterministic aircraft-swap and re-base proposals that improve the score — every suggestion shows its reasoning. Not AI, not a guaranteed optimum.
Deep diveEvery Part 121 workspace also includes the platform-wide backbone — logbook, credentials, compliance, reporting, and audit trail.
See the backboneSee fleet utilization on your operation.
It's part of the Part 121 workspace. Request a demo or join the waitlist.