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Category А

Training course objective

Objective of the training course for PART 66 category A is to enable the candidate to acquire knowledge and skills which permit the him/her to issue certificates of release to service following minor scheduled line maintenance and simple defect rectification within the limits of tasks specifically endorsed on the certification authorisation referred to in point 145.A.35 of Annex II (Part-145).

Category A is subdivided into four subcategories relative to combinations of aeroplanes, helicopters, turbine and piston engines. These subcategories are:

—  A1 Aeroplanes Turbine

—  A2 Aeroplanes Piston

—  A3 Helicopters Turbine

—  A4 Helicopters Piston

Minimum requirements to take up the training course or part of the course

The minimum requirements that the applicant should fulfil to take up the training or part of the training course are the following:

  • High school diploma
  • The applicant must be at least 18 years old
  • Entrance test in English language 

Training structure

The training course include: theoretical training, basic theoretical knowledge examinations, practical training and practical knowledge assessment.

Training is conducted as closely as possible to the real world of day-to-day aviation operations. Thanks to our close ties to AMO’s such as JAT Tehnics and others, we are able to incorporate a lot of operational and maintenance data into our cour­ses.

All our instructors are highly-qualified aircraft engineers, and their many years of aviation experience go into the training they provide. 

List of Subjests  / Examinations and assessment

Theoretical examinations are conducted using the multi-choice question format and essay questions. Number of questions and time allowed per subject is given in the following table:


Module * Cat Examinations
Number of question per Module

Time allowed



Time allowed


M1 Mathematics A 16 20
M2 Physics A 32 40
M3 Electrical Fundamentals A 20 25
M5 Digital Techniques Electronic Instrument Systems A 16 20
M6 Materials and Hardware A 52 65
M7A Maintenance Practices A 72 90 2 40
M8 Basic Aerodynamics A 20 25
M9A Human Factors A 20 25 1 20
M10 Aviation Legislation A 32 40 1 20
M11A Turbine Aeroplane Aerodynamics, Structures And Systems *A1 only 108 135
M11B Piston Aeroplane Aerodynamics, Structures And Systems * A2 only 72 90
M12 Helicopter Aerodynamics, Structures And Systems A3 & A4 only 100 125
M15 Gas Turbine Engine *A1 & A3 only 60 115
M16 Piston Engine *A2 & A4 only 52 65
M17A Propeller *A1 & A2 only 20 25


1 Suitable essay questions are drafted and evaluated using the knowledge syllabus  for Modules 7A, 9A and 10.  which are given in  Appendix I of PART-66. 

Acceptance of the previous training course

The previous training course or its part would be accepted if the applicant holds the evidence of training course completion in any EASA Part-147 approved maintenance organisation and the applicant only attends differential modules.