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EASA Part-66 License Categories


Category A
Issued after passing the appropriate modules and obtaining the appropriate experience. The person is allowed to sign for certain designated tasks only.

A1 - Turbine Engined Aeroplanes
A2 - Piston Engined Aeroplanes
A3 - Turbine Engined Helicopters
A4 - Piston Engined Helicopters

Category B
The licence is issued after passing all the appropriate modules and obtaining the appropriate experience. Allows the engineer to sign the Certificate of Release to Service for the aircraft in the category for which he/she is licensed.

B1.1 - Turbine Engined Aeroplanes
B1.2 - Piston Engined Aeroplanes
B1.3 - Turbine Engined Helicopters
B1.4 - Piston Engined Helicopters
B2 - Avionic
B3 - Piston engine non-pressurized aircraft below 2,000kg mass

Category C
The licence is issued after obtaining the appropriate experience. Allows the engineer to sign the Certificate of Release to Service following base maintenance on aircraft.




What Modules do I need to Study and Pass?

Module A or B1 aeroplane with: A or B1 helicopter with: B2 B3
Turbine engine(s) Piston engine(s) Turbine engine(s) Piston engine(s) Avionics Piston-engine non-pressurised aeroplanes 2000 kg MTOM and below
1 X X X X X X
2 X X X X X X
3 X X X X X X
4 X X X X X X
5 X X X X X X
6 X X X X X X
7A X X X X X
7B




X
8 X X X X X X
9A X X X X X
9B




X
10 X X X X X X
11A X




11B
X



11C




X
12

X X

13



X
14



X
15 X
X


16
X
X
X
17A X X



17B




X




How many questions will I get on my EASA Exam?

Number of questions per module

1. Mathematics
Category A: 16 multi-choice and 0 essay questions, 20 minutes.
Category B1: 32 multi-choice and 0 essay questions, 40 minutes.
Category B2: 32 multi-choice and 0 essay questions, 40 minutes.
Category B3: 28 multi-choice and 0 essay questions, 35 minutes.

2. Physics
Category A: 32 multi-choice and 0 essay questions, 40 minutes.
Category B1: 52 multi-choice and 0 essay questions, 65 minutes.
Category B2: 52 multi-choice and 0 essay questions, 65 minutes.
Category B3: 28 multi-choice and 0 essay questions, 35 minutes.

3. Electrical Fundamentals
Category A: 20 multi-choice and 0 essay questions, 25 minutes.
Category B1: 52 multi-choice and 0 essay questions, 65 minutes.
Category B2: 52 multi-choice and 0 essay questions, 65 minutes.
Category B3: 24 multi-choice and 0 essay questions, 30 minutes.

4. Electronic Fundamentals
Category B1: 20 multi-choice and 0 essay questions, 25 minutes.
Category B2: 40 multi-choice and 0 essay questions, 50 minutes.
Category B3: 8 multi-choice and 0 essay questions, 10 minutes.

5. Digital Techniques, Electronic Instrument Systems
Category A: 16 multi-choice and 0 essay questions, 20 minutes.
Category B1.1 and B1.3: 40 multi-choice and 0 essay questions, 50 minutes.
Category B1.2 and B1.4: 20 multi-choice and 0 essay questions, 25 minutes.
Category B2: 72 multi-choice and 0 essay questions, 90 minutes.
Category B3: 16 multi-choice and 0 essay questions, 20 minutes.

6. Materials and Hardware
Category A: 52 multi-choice and 0 essay questions, 65 minutes.
Category B1: 72 multi-choice and 0 essay questions, 90 minutes.
Category B2: 60 multi-choice and 0 essay questions, 75 minutes.
Category B3: 60 multi-choice and 0 essay questions, 75 minutes.

7A. Maintenance Practices
Category A: 72 multi-choice and 2 essay questions, 90 minutes plus 40 minutes.
Category B1: 80 multi-choice and 2 essay questions, 100 minutes plus 40 minutes.
Category B2: 60 multi-choice and 2 essay questions, 75 minutes plus 40 minutes.

7B. Maintenance Practices
Category B3: 60 multi-choice and 2 essay questions, 75 minutes plus 40 minutes.

8. Basic Aerodynamics
Category A: 20 multi-choice and 0 essay questions, 25 minutes.
Category B1: 20 multi-choice and 0 essay questions, 25 minutes.
Category B2: 20 multi-choice and 0 essay questions, 25 minutes.
Category B3: 20 multi-choice and 0 essay questions, 25 minutes.

9A. Human Factors
Category A: 20 multi-choice and 1 essay question, 25 minutes plus 20 minutes.
Category B1: 20 multi-choice and 1 essay question, 25 minutes plus 20 minutes.
Category B2: 20 multi-choice and 1 essay question, 25 minutes plus 20 minutes.

9B. Human Factors
Category B3: 16 multi-choice and 1 essay questions, 20 minutes plus 20 minutes.

10. Aviation Legislation
Category A: 32 multi-choice and 1 essay question, 40 minutes plus 20 minutes.
Category B1: 40 multi-choice and 1 essay question, 50 minutes plus 20 minutes.
Category B2: 40 multi-choice and 1 essay question, 50 minutes plus 20 minutes.
Category B3: 32 multi-choice and 1 essay questions, 40 minutes plus 20 minutes.

11A. Turbine Aeroplane Aerodynamics, Structures and Systems
Category A: 108 multi-choice and 0 essay questions, 135 minutes.
Category B1: 140 multi-choice and 0 essay questions, 175 minutes.

11B. Turbine Aeroplane Aerodynamics, Structures and Systems
Category A: 72 multi-choice and 0 essay questions, 90 minutes.
Category B1: 100 multi-choice and 0 essay questions, 125 minutes.

11C. Turbine Aeroplane Aerodynamics, Structures and Systems
Category B3: 60 multi-choice and 0 essay questions, 75 minutes.

12. Helicopter Aerodynamics, Structures and Systems
Category A: 100 multi-choice and 0 essay questions, 125 minutes.
Category B1: 128 multi-choice and 0 essay questions, 160 minutes.

13. Aircraft Aerodynamics, Structures and Systems
Category B2: 180 multi-choice and 0 essay questions, 225 minutes.
Questions and time allowed may be split into two examinations as appropriate.

14. Propulsion
Category B2: 24 multi-choice and 0 essay questions, 30 minutes.

15. Gas Turbine Engine
Category A: 60 multi-choice and 0 essay questions, 75 minutes.
Category B1: 92 multi-choice and 0 essay questions, 115 minutes.

16. Piston Engine
Category A: 52 multi-choice and 0 essay questions, 65 minutes.
Category B1: 72 multi-choice and 0 essay questions, 90 minutes.
Category B3: 68 multi-choice and 0 essay questions, 85 minutes.

17A. Propeller
Category A: 20 multi-choice and 0 essay questions, 25 minutes.
Category B1: 32 multi-choice and 0 essay questions, 40 minutes.

17B. Propeller
Category B3: 28 multi-choice and 0 essay questions, 35 minutes.





Basic Experience Requirements


(a) An applicant for an aircraft maintenance licence shall have acquired:

1. for category A, subcategories B1.2 and B1.4 and category B3:
(i) 3 years of practical maintenance experience on operating aircraft, if the applicant has no previous relevant technical training; or
(ii) 2 years of practical maintenance experience on operating aircraft and completion of training considered relevant by the competent authority as a skilled worker, in a technical trade; or
(iii) 1 year of practical maintenance experience on operating aircraft and completion of a basic training course approved in accordance with Annex IV (Part-147);

2. for category B2 and subcategories B1.1 and B1.3:
(i) 5 years of practical maintenance experience on operating aircraft if the applicant has no previous relevant technical training; or
(ii) 3 years of practical maintenance experience on operating aircraft and completion of training considered relevant by the competent authority as a skilled worker, in a technical trade; or
(iii) 2 years of practical maintenance experience on operating aircraft and completion of a basic training course approved in accordance with Annex IV (Part-147);

3. for category C with respect to large aircraft:
(i) 3 years of experience exercising category B1.1, B1.3 or B2 privileges on large aircraft or as support staff according to point 145.A.35, or, a combination of both; or
(ii) 5 years of experience exercising category B1.2 or B1.4 privileges on large aircraft or as support staff according to point 145.A.35, or a combination of both;

4. for category C with respect to other than large aircraft: 3 years of experience exercising category B1 or B2 privileges on other than large aircraft or as support staff according to point 145.A.35(a), or a combination of both;

5. for category C obtained through the academic route: an applicant holding an academic degree in a technical discipline, from a university or other higher educational institution recognised by the competent authority, 3 years of experience working in a civil aircraft maintenance environment on a representative selection of tasks directly associated with aircraft maintenance including 6 months of observation of base maintenance tasks.

(b) An applicant for an extension to an aircraft maintenance licence shall have a minimum civil aircraft maintenance experience requirement appropriate to the additional category or subcategory of licence applied for as defined in Appendix IV to this Annex (Part-66).

(c) The experience shall be practical and involve a representative cross section of maintenance tasks on aircraft.

(d) At least 1 year of the required experience shall be recent maintenance experience on aircraft of the category/ subcategory for which the initial aircraft maintenance licence is sought. For subsequent category/subcategory additions to an existing aircraft maintenance licence, the additional recent maintenance experience required may be less than 1 year, but shall be at least 3 months. The required experience shall be dependent upon the difference between the licence category/subcategory held and applied for. Such additional experience shall be typical of the new licence category/subcategory sought.

(e) Notwithstanding paragraph (a), aircraft maintenance experience gained outside a civil aircraft maintenance environment shall be accepted when such maintenance is equivalent to that required by this Annex (Part-66) as established by the competent authority. Additional experience of civil aircraft maintenance shall, however, be required to ensure adequate understanding of the civil aircraft maintenance environment.

(f) Experience shall have been acquired within the 10 years preceding the application for an aircraft maintenance licence or the addition of a category or subcategory to such a licence.



Part-66 Licence Extension Experience Requirements

The table below shows the experience requirements for adding a new category or subcategory to an existing Part-66 licence.

The experience shall be practical maintenance experience on operating aircraft in the subcategory relevant to the application.

The experience requirement will be reduced by 50% if the applicant has completed an approved Part-147 course relevant to the subcategory.

From / To A1 A2 A3 A4 B1.1 B1.2 B1.3 B1.4 B2 B3
A1 - 6 m 6 m 6 m 2 y 6 m 2 y 1 y 2 y 6 m
A2 6 m - 6 m 6 m 2 y 6 m 2 y 1 y 2 y 6 m
A3 6 m 6 m - 6 m 2 y 1 y 2 y 6 m 2 y 1 y
A4 6 m 6 m 6 m - 2 y 1 y 2 y 6 m 2 y 1 y
B1.1 None 6 m 6 m 6 m - 6 m 6 m 6 m 1 y 6 m
B1.2 6 m None 6 m 6 m 2 y - 2 y 6 m 2 y None
B1.3 6 m 6 m None 6 m 6 m 6 m - 6 m 1 y 6 m
B1.4 6 m 6 m 6 m None 2 y 6 m 2 y - 2 y 6 m
B2 6 m 6 m 6 m 6 m 1 y 1 y 1 y 1 y - 1 y
B3 6 m None 6 m 6 m 2 y 6 m 2 y 1 y 2 y -
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