The lines between flight operations and continuing airworthiness have never been thinner. If you work in a Continuing Airworthiness Management Organisation and still think of EDTO, RVSM, and NAT.HLA as purely operational matters handled by the flight operations department, it is time to reconsider. The regulatory reality under EU 965/2012, EU 1321/2014, and the forthcoming changes proposed in NPA 2025-12 makes one thing clear: CAMO professionals carry direct responsibilities for special operations — and the expectations are only increasing.
The Regulatory Intersection That Catches Organisations Off Guard
At first glance, OPS.SPA (Specific Approvals under Annex V of EU 965/2012) appears to sit firmly in the domain of Air Operations. EDTO approvals, RVSM operations, and NAT.HLA certification are, after all, operational capabilities. But dig into Part-CAMO under EU 1321/2014 and the picture changes substantially.
CAMO.A.315 requires that the Continuing Airworthiness Management Exposition (CAME) addresses the specific maintenance and airworthiness implications of every special operation the operator is approved for. This means the CAMO is not merely a passive participant. It is the organisation responsible for ensuring that the Aircraft Maintenance Programme, MEL management, reliability programme, parts configuration control, and maintenance contracts all reflect the additional requirements imposed by these special operational approvals.
The challenge many organisations face is that these responsibilities are distributed across multiple regulatory documents and cross-reference each other extensively. EU 965/2012 establishes the operational approval framework, while EU 1321/2014 governs the continuing airworthiness obligations that underpin those approvals. ICAO Annex 6, Part I, and ICAO Doc 10085 provide the international standards on which the European framework is built. Without a clear understanding of how these regulations interact, gaps inevitably appear in the CAME, in the AMP, and in the interface procedures with contracted Part-145 organisations.
From ETOPS to EDTO: More Than a Name Change
One of the most significant terminology shifts in recent years was the transition from ETOPS (Extended Range Operations with Two-Engine Aeroplanes) to EDTO (Extended Diversion Time Operations), introduced through Amendment 36 to ICAO Annex 6, Part I. This was not merely a rebranding exercise. EDTO broadened the scope beyond twin-engine aircraft to encompass all aeroplanes operating at extended diversion times from adequate aerodromes, regardless of engine count.
For CAMO professionals, this transition has practical consequences. The CMP (Configuration, Maintenance, and Procedures) document referenced in the aircraft TCDS specifies the minimum configuration and dispatch standards for EDTO operations. These requirements must be reflected in the AMP, in MEL dispatch conditions, and in dedicated EDTO procedures within the CAME or a standalone EDTO manual.
EDTO significant systems — those whose failure or degradation could adversely affect the safety of a diversion — require dedicated attention. These systems span electrical, hydraulic, pneumatic, fuel, flight control, engine, APU, pressurisation, fire suppression, and emergency equipment subsystems. The CAMO must identify and categorise these systems, ensure the reliability programme tracks their performance, and establish that dual maintenance limitations are properly managed to prevent common-cause failures.
The pre-departure check, the verification programme, the EDTO release statement, and the parts and configuration control programme are all CAMO-driven processes. Getting any one of these wrong does not simply create a compliance finding — it can result in an aircraft being dispatched without the airworthiness assurance that EDTO operations demand.
RVSM and NAT.HLA: The Airspace Dimension
While EDTO dominates much of the continuing airworthiness discussion, RVSM (Reduced Vertical Separation Minimum) and NAT.HLA (North Atlantic High Level Airspace) operations bring their own set of airworthiness considerations that CAMOs must address.
RVSM operations between FL285 and FL420 require aircraft to meet specific altimetry system performance standards. The CAMO must ensure that height-keeping equipment is maintained and monitored in accordance with applicable requirements, and that MEL provisions correctly reflect the minimum dispatch conditions for RVSM-approved flights.
NAT.HLA operations layer additional complexity through the Data Link Mandate, which requires CPDLC (Controller Pilot Data Link Communications) and ADS-C (Automatic Dependent Surveillance — Contract) capability for flights between FL290 and FL410 in the NAT region. Navigation requirements include dual Long Range Navigation Systems, RNP capability, and GNSS approvals. The maintenance implications of these avionics requirements — including GNSS interference and spoofing considerations — must be reflected in the CAME and addressed in the interface procedures with contracted maintenance organisations.
MEL management for RVSM and NAT.HLA is a particular area where CAMO engineers need robust knowledge. Dispatching an aircraft with an inoperative system that affects its NAT.HLA or RVSM approval status requires careful assessment against both the operator's MEL and the broader NAT Doc 007 requirements. NAT Doc 007 V.2025-1.1, effective from March 2025, provides the current operational framework and equipment requirements that dispatchers and CAMO personnel must understand.
NPA 2025-12: The Regulatory Landscape Is Shifting
EASA's Notice of Proposed Amendment 2025-12, published in two parts covering both explanatory notes and proposed amendments to EU 1321/2014, signals a significant development for CAMO organisations managing EDTO fleets.
The proposed Appendix VI to AMC to Part-CAMO introduces dedicated EDTO considerations that address continuing airworthiness management, maintenance expositions, AMP and reliability programme requirements, EDTO significant systems, parts configuration control, contracting and interface management, personnel competence and qualification, and occurrence reporting.
One of the most consequential proposals is the formalisation of EDTO training requirements. The NPA proposes that all CAMO personnel involved in the continuing airworthiness management of aircraft conducting EDTO should have knowledge of EDTO procedures. Furthermore, the CAMO should ensure that Part-145 personnel involved in EDTO maintenance activities complete an EDTO training course reflecting the relevant procedures. This training is proposed to cover the full spectrum from EDTO regulations and type design approval through to continuing airworthiness elements, reliability programmes, and maintenance contract interface procedures.
The proposed amendments also affect Part-145 organisations, with EDTO knowledge appearing as a competency assessment element across all personnel categories — from managers and planners to certifying staff, mechanics, and compliance monitoring personnel.
Organisations that wait until these amendments enter into force before building their EDTO training and procedural framework will find themselves in a reactive position. Those that prepare now will be ahead of the curve.
Bridging the Knowledge Gap
The reality on the ground is that many CAMO organisations recognise they have gaps in OPS.SPA knowledge. The operational approvals were obtained, the procedures exist on paper, but the depth of understanding among airworthiness professionals — particularly on how to handle EDTO events, how to review an AMP for EDTO compliance, or how to manage MEL scenarios affecting special operations — often falls short of what the regulations expect.
This is not a criticism of the professionals involved. The regulatory framework is genuinely complex, and the intersection of Air Operations and Continuing Airworthiness regulations requires a level of cross-domain competence that traditional training pathways do not always provide.
What the industry needs is targeted, regulation-aligned training that takes CAMO engineers and airworthiness professionals through the entire OPS.SPA landscape: from the regulatory foundations in EU 965/2012 and EU 1321/2014, through the technical requirements for EDTO, RVSM, and NAT.HLA, to the practical application of these requirements in the CAME, AMP, MEL management, and maintenance contracts — including the changes proposed under NPA 2025-12.
Develop Your OPS.SPA Competence with Aviathrust
Aviathrust's EDTO/ETOPS & OPS.SPA Training Course for CAMOs & AMOs training course is designed specifically for CAMO engineers. airworthiness and Aircraft Maintenance professionals who need to build or strengthen their competence in managing special operations approvals.
Delivered over 2 days via Microsoft Teams, this comprehensive course covers the full regulatory framework, EDTO continuing airworthiness requirements, RVSM and NAT.HLA operations, CAME integration, and the proposed NPA 2025-12 changes — with practical case studies including AMP review for EDTO compliance, MEL dispatch scenarios, and EDTO event follow-up actions.
This course directly addresses the training requirements proposed under NPA 2025-12, Appendix VI to AMC to Part-CAMO, helping your organisation prepare for the regulatory changes ahead.
