Part-ML continuing airworthiness for a training fleet
Part-ML is the continuing-airworthiness regime that applies to most light aircraft used in training, those not managed under Part-CAMO. It covers the aircraft’s maintenance programme, the Airworthiness Review Certificate (ARC), airworthiness directives, and the recording of hours and cycles. FlyerOS models these against the schedule, so an aircraft with an expiring ARC or an open defect stops being bookable, and one approaching a due check is flagged against any booking that would fly it beyond its limits, with the tolerance in its programme applied.
What Part-ML asks of the school
- Each aircraft is maintained to an approved or declared maintenance programme.
- The aircraft is managed on a clear basis (owner-managed, CAMO or CAO), which governs the ARC and the annual review.
- A valid Airworthiness Review Certificate (ARC) is held and kept current.
- Applicable airworthiness directives and life-limited items are tracked and actioned by their limits.
- Hours, cycles and landings are recorded accurately, because the maintenance forecast depends on them.
FlyerOS helps you operate your approved or declared procedures. It does not itself confer certification or approval, and it is not legal or regulatory advice. The authority named here is the current reference; always work from the regulation itself.
How FlyerOS supports it
Airworthiness the schedule respects
An open defect, a directive or an expiring ARC makes an aircraft unbookable the moment it is recorded; a scheduled check coming due is forecast against each booking with the tolerance in the programme applied.
The forecast looks forward
An aircraft that would be flown beyond its limits on the fourteenth is refused for the fourteenth, because eligibility is evaluated for the time of the flight; a check merely coming due within tolerance is flagged as a decision instead.
Directives, worked out per airframe
Airworthiness directives and service bulletins carry their applicability per airframe and serial range, with compliance recorded, supersession handled, and recurring items becoming scheduled requirements.
Components and management basis
Life-limited component life accrues across installations, and the ARC with its management basis (owner-managed, CAMO or CAO) is held as dated, structured data the schedule reads.
Counter readings carry their provenance
Hours and cycles record their source, and corrections append rather than overwrite, so the forecast can be trusted.
Questions schools ask
- Is FlyerOS a Part-ML CAMO or a maintenance system?
- No. FlyerOS is the operational system of record; it holds airworthiness status and enforces it in the schedule. It does not replace your maintenance organisation or sign off maintenance.
- What happens when an aircraft’s ARC expires mid-week?
- The aircraft stops being dispatchable from the moment of expiry, and any booking against it after that instant fails with the reason on the screen of the person trying.
- Does it handle aircraft outside Part-ML too?
- The airworthiness model is the same regardless of regime: you record the programme, the review certificate and the limits that apply to each aircraft, and the schedule respects them.