Showing content mapped to EASA Part-66. Change authority in the header.
Regulatory hierarchy (EASA)
ICAO sets international standards (SARPs). EASA implements EU regulations, which member-state authorities (e.g. DGAC, LBA, ENAC) enforce. Basic Regulation (EU) 2018/1139 provides the top-level framework, with Continuing Airworthiness rules in (EU) 1321/2014 (Parts M, 145, 66, 147, CAO, CAMO).
Part-66 licence categories
CAT A — line-maintenance certifying mechanic (limited task list). CAT B1 — mechanical (B1.1 turbine, B1.2 piston, B1.3 turbine helicopter, B1.4 piston helicopter). CAT B2 — avionics. CAT C — base-maintenance certification (aircraft/engineer with degree or B1/B2 experience). The category structure is identical between EASA and UK CAA.
Part-145 approved organisations
An organisation approved to maintain large aircraft or aircraft used for commercial air transport. Requires accountable manager, form-4 post-holders, hangar/tooling, an MOE (Maintenance Organisation Exposition) and quality/safety systems.
Documents
EASA Form 1 — Authorised Release Certificate (component). CRS — Certificate of Release to Service (aircraft). AD — Airworthiness Directive (mandatory). SB — Service Bulletin (manufacturer). AMM/IPC/SRM — Aircraft Maintenance Manual / Illustrated Parts Catalogue / Structural Repair Manual.