Aircraft maintenance licence (Part-66) | Traficom
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Aircraft maintenance licence (Part-66)

You will need an aircraft maintenance licence (Part-66) to work as a civil aircraft maintenance mechanic (certifying staff). Part-66 licences are divided into seven categories depending on the content of the relevant tasks.

  • A: Minor scheduled line maintenance and simple defect rectification as specifically endorsed on the authorisation
    • A1 Aeroplanes Turbine
    • A2 Aeroplanes Piston
    • A3 Helicopters Turbine
    • A4 Helicopters Piston
  • B1: Maintenance performed on aircraft structure, powerplant, and mechanical and electrical systems
    • B1.1 Aeroplanes Turbine
    • B1.2 Aeroplanes Piston
    • B1.3 Helicopters Turbine
    • B1.4 Helicopters Piston
  • B2: Maintenance performed on avionic and electrical systems
  • B2L: Maintenance performed on light aircraft avionic and electrical systems
    • Communication/navigation (com/nav)​​​​​​​
    • Instruments
    • autoflight
    • surveillance
    • airframe systems
  • B3: Non-pressurised single engine piston aeroplanes
  • C: Certificates of release to service after base maintenance 
    • Complex aircraft
    • Non-complex aircraft
  • L: Light aircraft
    • L1C: composite sailplanes
    • L1: sailplanes
    • L2C: composite powered sailplanes and composite ELA1 airplanes
    • L2: powered sailplanes and ELA1 airplanes
    • L3H: hot-air balloons
    • L3G: gas balloons
    • L4H: hot-air airships
    • L4G: ELA2 gas airships
    • L5: gas airships other than ELA2
    •  

How to obtain your first aircraft maintenance licence

  • Step 1

    Age requirement

    To apply for an aircraft maintenance licence, you must be at least 18 years of age

  • Step 2

    Training and examinations

    The required training for category A and B includes a basic training course and examinations. The level of knowledge required for each licence category and subcategory is demonstrated by completing a basic knowledge examination organised by an approved Part-147 training organisation. Category L knowledge examination is organised by aviation authority.

    A category C licence may also be issued to an applicant holding an academic degree in a technical discipline from a university or other higher educational institution.

  • Step 3

    Experience requirements

    When you are applying for your first licence, you must have acquired the relevant work experience within the 10 years preceding your application. Experience requirements are lowest for applicants who have completed an approved basic training course and basic knowledge examinations in a Part-147 training organisation and highest for applicants with no vocational training in a technical field. Between these two extremes are applicants who have completed a vocational qualification approved by Traficom, such as a basic training course in some other category/subcategory than the one that the application concerns.

    Applicants are required to have diverse practical maintenance experience on operating civil aircraft. Applicants must have at least 6 months of recent maintenance experience during the year preceding the application. Traficom may also accept experience gained outside a civil aircraft maintenance environment to count towards the experience requirement. However, applicants must still have at least 12 months of civil aircraft maintenance experience. 12 months time period can be compensated with 200 days maintenance experience.

    For a category C licence obtained through the academic route, applicants must have at least three years of civil aircraft maintenance experience. The experience must cover a diverse range of tasks directly associated with aircraft maintenance, including minimum six months of observation of base maintenance tasks.

    Basic experience requirements (in years)A, B1.2, B1.4, B3B1.1, B1.3, B2
    Module examinations35
    Module examinations + AMC 66.A.30(a)3. Skilled worker23
    Part-147 basic training course12

     

  • Step 4

    Medical requirements

    EU legislation does not include any medical requirements for Part-66 licence applicants.

  • Step 5

    Apply for a licence

    Please note that the EMAR-66 license issued by the military aviation authority does not entitle the applicant to apply for a Part-66 license, but the applicant must prove the training and experience requirements of the Part-66 license.

Training

To extend an existing licence, you will be required to supplement your basic training to meet the requirements of the new category/subcategory. This means that you will need to take a basic knowledge examination organised by an approved Part-147 training organisation.

Experience requirements

The amount of work experience required depends on your current licence and the category/subcategory that you would like to add to your licence. The experience must be acquired in civil aircraft maintenance tasks relevant to the licence category in question.

You can apply for a category C licence if you hold a category B1 or B2 licence and have worked as a member of certifying staff in line and/or base maintenance for at least three years.

Apply for an extension to an aircraft maintenance licence

If you hold a category B1, B2, L or C aircraft maintenance licence, you can only issue certificates of release to service for a specific aircraft type when your licence includes the required type or group rating.

Type training includes theoretical and practical elements. As a rule, both theoretical and practical training must be organised by an appropriately approved Part-147 organisation. In exceptional cases, Traficom may directly grant a one-off approval.

When you apply for your first type rating, you are also required to complete on the job training (OJT) in a maintenance organisation. For certain aircraft groups, ratings may be issued on the basis of a type examination and/or practical experience.

Apply for the inclusion of an additional rating to your licence

A Part-66 licence may be issued through a conversion procedure based on an existing national licence or privilege. A conversion report is drawn up, comparing the training you have completed for the national privilege to the requirements of Part-66. Based on the report approved by Traficom, you will be issued a Part-66 licence with the privileges and restrictions resulting from the comparison.

For a Part-66L licence, a conversion report has been done to convert your national privileges to a corresponding Part-66L licence.

Apply for conversion of a national licence or privilegeConversion of national aircraft maintenance privileges to Part-66/L licence (pdf, 734 kt)

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