Development, Review & Revision for Every Type of Approved Aviation Organisation
The operations manual must do two things simultaneously.
It must satisfy the competent authority that the organisation understands and can comply with its regulatory obligations. And it must be genuinely usable by the operational teams who depend on it. A manual that achieves one without the other is a liability. AACS produces documentation that achieves both — every time.
Services include:
COMMERCIAL AIRLINES & NON-SCHEDULED OPERATORS
Services include:
CHARTER, NON-SCHEDULED & BUSINESS AVIATION OPERATORS
Services include:
APPROVED TRAINING ORGANISATIONS & FLIGHT TRAINING ORGANISATIONS
Services include:
PART 145 APPROVED MAINTENANCE ORGANISATIONS
Services include:
CONTINUING AIRWORTHINESS MANAGEMENT ORGANISATIONS (CAMO)
Services include:
AERODROME & AIRPORT OPERATORS
Services include:
The most important quality of any operations manual or exposition document is accuracy. The manual must describe how the organisation actually conducts its approved activities — not an idealised version of how it should, and not what the regulation prescribes in the abstract. When AACS develops a manual, we start by understanding the organisation: its approval scope, its aircraft, its crew, its maintenance practices, its base of operations, its commercial model. The documentation follows from that understanding.
An operations manual that was accurate at the point of authority acceptance and has not been revised since is a compliance risk and an operational liability. Organisations grow. Aircraft change. Routes extend. Regulations are amended. Procedures are refined through operational experience. The manual must reflect all of these changes. AACS designs document control and revision management systems that make keeping documentation current a managed process rather than an afterthought — and provides ongoing amendment support for organisations that want their documentation maintained by specialists.
The manual is accepted once. It must work for years.
Development, Review & Revision for Every Type of Approved Aviation Organisation
In aviation, the operations manual or organisation exposition is not simply a regulatory requirement — it is the defining document of how an approved organisation operates. Every aviation organisation that holds, or is seeking, approval from a competent authority must have documentation that accurately describes its structure, its processes, and the way it conducts its approved activities. That documentation must satisfy the authority that the organisation understands and can comply with its regulatory obligations. And it must remain accurate and usable as a live operational document long after approval is granted.
The problem is that most operations manuals fail one or both of these tests. Documents built to achieve approval — rather than to describe how the organisation actually works — create compliance risk from the day they are accepted. Procedures that look right on paper but bear no resemblance to operational practice are not followed. Manuals that are not maintained as the organisation evolves become misrepresentations of the approved activity. And authorities conducting oversight audits are experienced at identifying documentation that has been written to satisfy a checklist rather than to describe a real organisation.
Aerospace and Aviation Consulting Services (AACS) develops, reviews and revises operations manuals and exposition documents for every category of approved aviation organisation — from major airline operations manual suites through to single-aircraft charter operators, flight training organisations, Part 145 maintenance approvals and aerodrome operators. We write manuals that work: accepted by the authority, accurate about the organisation, and usable by the people who depend on them.
Who We Support Commercial airlines & non-scheduled operators │ Business jet & turboprop operators │ Charter & air taxi operators │ Corporate flight departments │ Approved Training Organisations (ATO) & Flight Training Organisations (FTO) │ Part 145 Approved Maintenance Organisations │ Continuing Airworthiness Management Organisations (CAMO) │ Aerodrome & airport operators │ Aviation start-ups seeking initial approval │ Operators varying or extending existing approvals |
Every aviation regulatory framework — EASA, UK CAA, ICAO and equivalent national authority structures — requires approved organisations to hold documentation that describes how they operate. This requirement is not bureaucratic formality. It exists because the authority cannot oversee what it cannot see. The operations manual or exposition is the window through which the competent authority assesses whether the organisation understands its obligations and is capable of discharging them safely and consistently.
The stakes attached to this documentation are high. An operations manual that does not accurately describe the organisation’s approved activity is a regulatory non-compliance, regardless of how safely the organisation actually operates. An exposition document that has not been kept current as the organisation has grown or changed misrepresents the approved organisation to the authority. And when something goes wrong — an incident, an accident, an authority audit — the manual is the first document examined. If it does not reflect reality, the organisation’s regulatory standing is immediately at risk.
Equally, a manual that accurately satisfies the authority but is not written for the people who use it creates operational risk. Certifying staff who cannot find the procedures they need, flight crew working around manual provisions that do not reflect the aircraft they fly, training instructors delivering syllabi that the manual does not support — these are not hypothetical failure modes. They are the predictable consequence of documentation that prioritises authority acceptance over operational usability.
The operations manual must do two things simultaneously. It must satisfy the competent authority that the organisation understands and can comply with its regulatory obligations. And it must be genuinely usable by the operational teams who depend on it. A manual that achieves one without the other is a liability. AACS produces documentation that achieves both — every time. |
Whether an organisation is applying for its initial approval, revising its documentation to reflect operational or regulatory change, or seeking an independent review of existing manuals ahead of an authority audit, AACS provides the full range of documentation development and advisory services. Our starting point is always the same: we understand how the organisation actually operates before we write a word.
Services include:
The structure, content and regulatory basis of an operations manual or exposition document varies significantly across different categories of approved aviation organisation. What a commercial airline must include in its OM-A is not the same as what a Part 145 maintenance organisation must describe in its MOE, nor what an Approved Training Organisation must cover in its training manual and exposition. Each has its own regulatory framework, its own competent authority expectations, and its own operational reality that the documentation must reflect.
AACS has direct experience developing and revising documentation across all of the following organisation types.
COMMERCIAL AIRLINES & NON-SCHEDULED OPERATORS |
Commercial air transport operators holding an Air Operator Certificate are required to maintain a four-part operations manual suite that covers every dimension of the approved operation — from the organisational framework and general operating procedures through to aircraft-specific technical information, route and airfield data, and crew training programmes. The suite must satisfy the requirements of UK CAA Part-OPS, EASA Part-OPS (EU operators), and the applicable Acceptable Means of Compliance and Guidance Material.
For airline start-ups, the operations manual suite is the central document of the AOC certification process. For established operators, it is a living framework that must be kept current with every regulatory change, fleet development and operational evolution. AACS develops and maintains airline operations manual suites that are built for authority acceptance and long-term operational usability.
Manual | Content Scope |
OM-A — General | Organisational structure, Accountable Manager and Nominated Person framework, general operating policies, safety management, compliance monitoring, crew responsibilities, flight time and duty period limitations, dangerous goods, security procedures |
OM-B — Technical | Aircraft-specific operating procedures, performance data and limitations, MEL procedures, normal and abnormal checklists, aircraft systems descriptions — one part per aircraft type |
OM-C — Route & Airfield | Route information, aerodrome data, instrument approach procedures, alternate selection criteria, area of operations specifics |
OM-D — Training | Initial and recurrent training syllabi for flight crew, cabin crew and ground operations personnel, CRM programme, emergency and safety equipment training, competency assessment framework |
Services include:
CHARTER, NON-SCHEDULED & BUSINESS AVIATION OPERATORS |
Charter operators and business aviation organisations conducting commercial operations under UK CAA or EASA frameworks carry the same fundamental operations manual obligations as scheduled airlines — but typically without the dedicated compliance and documentation infrastructure of a large carrier. The manual must be proportionate to the scale and nature of the operation while meeting the authority’s expectations in full. An OM-A written for a 200-aircraft scheduled airline is not appropriate for a two-aircraft charter operator. An OM-B for a bizjet operation must reflect the specific performance characteristics and operating environment of that aircraft type.
AACS designs operations manual suites for charter and business aviation operators that are accurate, proportionate and operationally usable — not airline templates with the logo changed.
Services include:
APPROVED TRAINING ORGANISATIONS & FLIGHT TRAINING ORGANISATIONS |
Approved Training Organisations (ATOs) approved under EASA Part-ORA, and Flight Training Organisations (FTOs) approved under equivalent national frameworks, are required to hold a combination of exposition and training documentation that describes both the organisation and the training it delivers. The exposition must satisfy the authority that the ATO is structured, resourced and governed to conduct the approved training safely and to standard. The training documentation must demonstrate that every course element is properly designed, sequenced, and assessable.
For flight schools and training organisations, the documentation challenge is distinctive. Unlike airline operations manuals, which describe an operator, ATO documentation must describe a training environment — the instructional philosophy, the course architecture, the assessment framework, and the quality assurance processes that ensure training standards are consistently delivered. A poorly constructed training manual produces inconsistency in the training room, variance in student outcomes, and vulnerability in authority oversight.
Services include:
PART 145 APPROVED MAINTENANCE ORGANISATIONS |
For Part 145 Approved Maintenance Organisations, the Maintenance Organisation Exposition is the equivalent of the airline operations manual — the defining document of the approved organisation. The MOE must describe the AMO’s scope of approval, its organisational structure, its procedures for all maintenance activities, its quality and compliance monitoring system, its certifying staff authorisation framework, and its interfaces with contracted maintenance providers and component suppliers. It must be accepted by the competent authority and must remain current as the organisation evolves.
The MOE is scrutinised in detail at every authority oversight audit. Discrepancies between the MOE and how the organisation actually operates — whether in its quality procedures, its certifying staff authorisation processes, or its contracted maintenance arrangements — are findings that place the approval at risk. AACS produces MOEs that accurately describe how the AMO works, not simply what the regulation requires in the abstract.
MOE Part | Content Scope |
Part 0 — General | Organisational structure, Accountable Manager statement, management responsibilities, personnel numbers and qualifications |
Part 1 — Management | Quality / compliance monitoring system, safety management, compliance monitoring procedures, internal audit programme, authority liaison |
Part 2 — Maintenance Procedures | Aircraft/component acceptance, maintenance planning, accomplishment of maintenance, certifying staff authorisation, completion of maintenance records, return to service |
Part 3 — Quality System | Quality policy, audit programme, corrective action, supplier approval and control, contracted maintenance procedures |
Part 4 — Appendices | Approval schedule, example forms and records, list of contracted organisations, list of approved suppliers |
Services include:
CONTINUING AIRWORTHINESS MANAGEMENT ORGANISATIONS (CAMO) |
Continuing Airworthiness Management Organisations approved under EASA Part-M Subpart G or UK Part-CAMO are required to hold an exposition that describes how the organisation manages the continuing airworthiness of the aircraft under its responsibility. The CAMO exposition must cover the organisational framework, the continuing airworthiness management procedures, the airworthiness review process, the interface with Part 145 maintenance organisations, and the safety and compliance management systems that underpin the airworthiness management activity.
For operators managing their own continuing airworthiness, and for independent CAMOs managing aircraft on behalf of owners and operators, the exposition is both a regulatory requirement and an operational framework that directly affects the airworthiness of the managed fleet. AACS develops and revises CAMO expositions for independent CAMOs, airline integrated CAMO functions, and business aviation operators managing their own continuing airworthiness.
Services include:
AERODROME & AIRPORT OPERATORS |
Certificated aerodromes are required to hold an Aerodrome Manual that describes the aerodrome’s physical characteristics, its operational procedures, its safety management arrangements, and the regulatory framework within which it operates. For larger airports, the Airport Operational Manual (AOM) is a more extensive document that describes the full range of airport operational procedures across all functions — airside operations, ground handling, emergency response, security and environmental management.
The Aerodrome Manual must be accepted by the Civil Aviation Authority and must accurately describe the certificated aerodrome. Discrepancies between the manual and the physical or operational reality of the aerodrome are findings at authority oversight. For aerodrome operators approaching initial certification, or those revising existing documentation following physical changes, operational changes or regulatory updates, AACS provides specialist aerodrome documentation development and review services.
Services include:
The gap between an operations manual that achieves regulatory acceptance and one that genuinely supports safe, compliant operations is wider than many organisations realise. Authority acceptance is a necessary condition — but it is not sufficient. A manual can be accepted by the authority and still fail operationally. Understanding what distinguishes genuinely effective documentation from documentation that merely passes is essential for any organisation commissioning manual development or revision.
The most important quality of any operations manual or exposition document is accuracy. The manual must describe how the organisation actually conducts its approved activities — not an idealised version of how it should, and not what the regulation prescribes in the abstract. When AACS develops a manual, we start by understanding the organisation: its approval scope, its aircraft, its crew, its maintenance practices, its base of operations, its commercial model. The documentation follows from that understanding.
Generic templates — however well-written — cannot achieve this. A template describes a hypothetical organisation. An AACS-produced manual describes a real one.
The authority is not the primary user of an operations manual. The certifying engineer checking the manual before releasing an aircraft is. The training captain using the OM-D to plan a recurrent training event is. The dispatcher referencing OM-C before filing a flight plan is. A manual written solely for the authority, in language designed to satisfy a regulatory checklist, does not serve these users. A manual written for operational usability — clearly structured, clearly expressed, accessible in the moment of use — serves both the authority and the people who depend on it.
An operations manual that was accurate at the point of authority acceptance and has not been revised since is a compliance risk and an operational liability. Organisations grow. Aircraft change. Routes extend. Regulations are amended. Procedures are refined through operational experience. The manual must reflect all of these changes. AACS designs document control and revision management systems that make keeping documentation current a managed process rather than an afterthought — and provides ongoing amendment support for organisations that want their documentation maintained by specialists.
An operations manual does not exist in isolation. For an airline, the OM-A must be consistent with the SMS framework. The OM-D must align with the CRM training programme. For a Part 145 AMO, the MOE must be consistent with the ISO 9001 quality management system. For a CAMO, the exposition must align with the interface procedures held by contracted Part 145 organisations. AACS designs documentation with these interfaces in mind — producing a coherent organisational framework, not a collection of documents that were written independently and may conflict.
The manual is accepted once. It must work for years. Authorities grant approval based on the documentation presented at certification. But it is the operational teams — crew, engineers, instructors, managers — who use that documentation every day for years afterwards. A manual built for the certification process alone is optimised for a single moment. An AACS-produced manual is built to serve the organisation throughout its operational life. |
AACS advisors have direct experience developing and revising aviation operations manuals and exposition documents under EASA, UK CAA, ICAO and equivalent national authority frameworks. We have navigated initial approval processes, scope extensions, regulatory transitions and authority oversight responses across the full range of organisation types covered on this page. We know what competent authority inspectors look for — and we know the difference between documentation that satisfies a checklist and documentation that reflects a genuinely capable organisation.
Unlike generalist consultants who focus on one segment of the aviation sector, AACS has documented experience across commercial airlines, charter operators, business aviation, flight training organisations, Part 145 maintenance organisations, CAMOs and aerodrome operators. This breadth matters because many aviation organisations operate across multiple approval categories — an AOC holder may also hold a Part 145 approval, or a charter operator may seek CAMO approval — and their documentation must be coherent across all approvals.
Every AACS-produced manual is written from the ground up for the specific organisation. We do not adapt templates. We do not reuse language that was written for a different organisation in a different operational context. We conduct a thorough operational assessment of how the organisation works, what its approval scope requires, and what its operational teams need from the documentation — and we write accordingly.
The result is documentation that authority inspectors find credible because it clearly reflects a real organisation — and that operational teams find usable because it describes how they actually work.
Manual development does not end when the document is submitted to the competent authority. Authority reviews generate comments. Comments require responses. Responses may require manual revision. This iteration between the organisation and the authority — which can extend over months for complex approvals — requires careful management. AACS supports clients through the full authority engagement process, drafting responses to authority comments, managing revision cycles, and ensuring that the acceptance process reaches a conclusion efficiently.
AACS provides ongoing revision and amendment services for organisations that want their operational documentation maintained by specialists. As regulatory frameworks evolve, as the organisation’s scope changes, and as operational experience identifies procedural refinements, documentation must be updated. We provide a structured amendment service that keeps manuals current, manages the revision record, and ensures that authority notification and approval obligations are met when changes require regulatory acceptance.
AACS approaches operations manual and exposition development with a clear and consistent conviction: documentation that does not reflect operational reality is not a compliance asset — it is a liability. The manual that earns authority acceptance through generic, well-ordered language, but does not describe how the organisation actually works, creates more risk than it manages. It misleads the authority. It fails the operational teams. And when something goes wrong, it provides no defence.
✔ Every manual we produce is written for the specific organisation — not adapted from a generic template
✔ We document what the organisation does — not what the regulation prescribes in the abstract
✔ We design for operational usability — the manual must work for the people who depend on it, not just satisfy the authority that approves it
✔ We manage the authority engagement process from submission through to acceptance — not just the document
✔ We design document control systems that keep manuals current — not static approval artefacts that diverge from reality
✔ We integrate documentation with the organisation’s wider compliance, safety and quality frameworks — producing a coherent operational governance structure
✔ Our advice is independent — we have no commercial relationship with any authority, certification body or third-party provider
We deliver documentation that is independently assessed as accurate, operationally credible, and built on over 30 years of real-world aviation regulatory and operational expertise. Whether you are building documentation for the first time, revising existing manuals to reflect change, or seeking independent review ahead of an authority audit, AACS provides the expertise to produce manuals that work.
Speak to an AACS Specialist
If you need an operations manual developed, revised or reviewed — for any category of approved aviation organisation — please contact us. We will be direct about what your documentation requires, what the authority will expect, and how we can help you achieve acceptance efficiently.