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.

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