EASA Module 16 key terms

The European licence that certifies an individual's competence to release aircraft after maintenance, issued by a competent authority in categories A, B1, B2, B3, C or with certain endorsements.

A Part-66 licence category covering mechanical and airframe, engine and electrical system maintenance, allowing the holder to certify work and release aircraft after line maintenance within its scope.

A Part-66 licence category focused on avionic systems, permitting the holder to certify maintenance and release aircraft for avionic work within the privileges of the licence.

A Part-66 licence category that allows the holder to certify the completion of base maintenance on an aircraft, typically exercised in a Part-145 organisation under its procedures.

Personnel who hold the required licence and authorisation to sign a maintenance release, declaring that the maintenance work has been properly completed and the aircraft is fit for flight.

A written approval granted by a Part-145 organisation that permits an individual to certify maintenance work within defined limits, often for staff who do not hold a full Part-66 licence.

A special authorisation issued by a competent authority or Part-145 organisation allowing a person to certify specified maintenance tasks, usually in a situation where full licence coverage is not practicable.

An approved organisation that performs maintenance on aircraft and components under a maintenance organisation approval, maintaining facilities, procedures and quality systems acceptable to the competent authority.

The document that describes a Part-145 organisation's scope of work, facilities, procedures and quality system, forming the basis for its approval and day-to-day compliance.

The regulatory framework that requires aircraft owners and operators to keep aircraft airworthy through maintenance, inspections, defect control and record keeping throughout the aircraft's life.

An organisation approved to manage the continuing airworthiness of aircraft, including developing maintenance programmes and controlling tasks, under a CAMO approval.

The approved schedule of maintenance tasks, intervals and inspections that an operator or owner must follow to keep an aircraft airworthy and compliant with its type design.

A certificate confirming that an aircraft's continuing airworthiness has been reviewed and found satisfactory, required periodically to keep the aircraft legally flyable.

A mandatory instruction issued by an aviation authority to correct an unsafe condition, requiring specified inspections or modifications to be accomplished within stated compliance times.

A manufacturer's document recommending inspections, modifications or improvements to a product, which becomes mandatory only when an authority adopts it through an Airworthiness Directive or regulation.

A certification, signed after maintenance, confirming that the work has been completed satisfactorily and that the aircraft or component is fit for return to service.

A formal statement, usually signed by authorised certifying staff, that maintenance has been completed and the aircraft or component may be returned to service.

An approved organisation that provides basic and type training for maintenance personnel, meeting regulatory requirements for facilities, instructors, examinations and training syllabi.

The initial training, delivered by an approved Part-147 organisation or accepted equivalent, that gives candidates the knowledge and skills required for a Part-66 licence category.

Training on a specific aircraft type that covers its systems, maintenance practices and relevant procedures, required before a licence holder can certify work on that type.

The national aviation body designated by a state to issue licences, approve organisations and oversee compliance with maintenance and continuing airworthiness regulations.

An approval issued for an aircraft, engine or propeller design confirming that it meets applicable airworthiness requirements and defining the product's approved configuration.

An approval for a change to a product's type design, such as a modification or installation, that is issued separately from the original type certificate.

Maintenance carried out before flight to ensure the aircraft is fit for the intended flight, including inspections, defect rectification and routine servicing at the operating base or line stations.

Maintenance performed when the aircraft is taken out of service for larger scheduled checks, typically in a hangar, involving extensive inspection, repair and system testing.

The documented set of procedures, responsibilities and audits used by an approved organisation to ensure that maintenance and training meet regulatory and organisational requirements.

The requirement to report maintenance errors, defects, incidents and unsafe conditions to the relevant authority and organisation so that safety risks can be investigated and addressed.

The study of how human capabilities and limitations, such as fatigue, workload and communication, affect maintenance performance and safety, used to design procedures and training.

Documents that record maintenance performed, including task details, dates, signatures and parts used, and which support airworthiness reviews and traceability of work.

The technical instructions, manuals and procedures approved or accepted for performing maintenance, which certifying staff must follow when carrying out and releasing work.

The status that allows an aircraft part or appliance to be installed, based on its production under an approved scheme and its eligibility for the specific installation.

The set of processes and tasks, from delivery to withdrawal from service, that keep an aircraft compliant with airworthiness requirements and safe to operate.

The practical maintenance experience, documented and of a specified duration, that a candidate must complete before being eligible for a Part-66 licence in a given category.

The set of theoretical assessments covering regulatory, technical and human factors subjects that candidates must pass to demonstrate knowledge for a licence category.

A documented assessment of an aircraft's records, configuration and physical condition to verify that continuing airworthiness requirements have been met before issuing a review certificate.

The organisational approach of identifying hazards, assessing risks and putting mitigations in place, supported by reporting and performance monitoring, to reduce maintenance-related accidents.