EASA regulations, explained and applied
Practical tables, checklists and cited explanations for aviation work. Start with a quick reference for a specific question, or follow a series from first principles to working practice. Regulation quotations include their source and revision.
66 guides in 12 seriesLast updated 21 Oct 2026RSS feed
Quick references
Practical comparisons, checklists and FAQs, with sources.
- ETSO, FAA TSO and Certification SpecificationsCompare ETSO, FAA TSO and EASA certification specifications. Understand article approval, installation limits, DDPs and engineering checks.6 min
- EASA Form 1 and FAA Form 8130-3 AcceptanceCompare EASA Form 1 and FAA Form 8130-3 for new and maintained components, understand release blocks, and check acceptance and installation limits.7 min
- CAMO, CAO and Part-145: Roles ComparedCompare EASA CAMO, CAO and Part-145 responsibilities, approval limits, owner duties and the handover from maintenance planning to release and records.7 min
- Part-IS Requirements, Deadlines and ChecklistCheck Part-IS applicability, the 2025 and 2026 deadlines, scope exceptions, approved derogations and the evidence an aviation ISMS needs.8 min
- EASA Part-66 Licence: Categories and RoutesChoose an EASA Part-66 licence route: categories, knowledge, experience, type training and OJT, plus what a Part-145 authorisation adds.7 min
Regulatory foundations
How the rulebooks themselves work — reading the EASA system of implementing rules, AMC, GM and CS, and how the FAA, UK CAA and other national systems compare.
Aviation Regulatory Systems
5 guides · 41 minHow to read aviation regulations and how the major regulatory systems compare — the EASA structure of implementing rules, AMC, GM and certification specifications, the FAA's 14 CFR, and the UK CAA, GCAA, GACA and Transport Canada systems that grew from the same ICAO root.
Airworthiness and maintenance
How an aircraft is designed, certified and kept fit to fly — from initial type certification, through the approved maintenance organisation, to the records that release it back to service.
EASA Continuing Airworthiness
12 guides · 139 minContinuing airworthiness under Regulation (EU) No 1321/2014 — Part-M responsibilities and the aircraft maintenance programme, reliability monitoring, airworthiness reviews and the ARC, the Part-CAMO/CAO management organisation, maintenance release to service and records, airworthiness directives, and component and life-limited part records.
- 1Continuing Airworthiness: Part-M and Part-CAMO16 min
- 2Aircraft Maintenance Programme under Part-M10 min
- 3EASA Reliability Programmes and Monitoring5 min
- 4Airworthiness Reviews and the ARC12 min
- 5CAMO, CAO and Part-145: Roles Compared7 min
- 6Part-M: Release to Service and Records11 min
- 7EASA Airworthiness Directives and AD Compliance21 min
- 8LLP Back-to-Birth Records and M.A.305 Tracking17 min
- 9Aircraft Reliability Programme, Step by Step13 min
- 10Service Bulletin Evaluation in a CAMO8 min
- 11CAMO Staff Competence and Manpower Planning9 min
- 12CAMO Subcontracting and Maintenance Contracts10 min
EASA Part-145 Maintenance Organisation
9 guides · 74 minThe EASA Part-145 approved maintenance organisation under Regulation (EU) No 1321/2014 — terms of approval and privileges, certifying and support staff, maintenance data and performing the work, certification of maintenance and records, the maintenance organisation exposition (MOE), and tool control and calibration under 145.A.40.
- 1Part-145: The Approved Maintenance Organisation4 min
- 2Part-145 Certifying and Support Staff12 min
- 3Part-145 Maintenance Data and Performance8 min
- 4Part-145 Maintenance Certification and Records6 min
- 5The Maintenance Organisation Exposition (MOE)6 min
- 6Part-145 Tool Control and Calibration (145.A.40)17 min
- 7Receiving Inspection of Aircraft Parts: 145.A.427 min
- 8Part-145 Approved Supplier List and Evaluation8 min
- 9Part-145 Parts Storage, Shelf Life and ESD6 min
EASA Part-21 Initial Airworthiness
6 guides · 40 minInitial airworthiness under Regulation (EU) No 748/2012 (Part-21) — the design-to-service lifecycle, certification specifications and ETSO authorisations, type certificates and the TCDS, design and production organisations, certificates of airworthiness and permits to fly, and parts and the EASA Form 1.
- 1Airworthiness Lifecycle: Design to Service6 min
- 2ETSO, FAA TSO and Certification Specifications6 min
- 3Type Certification: TC, TCDS and Changes7 min
- 4DOA and POA: Design and Production Organisations6 min
- 5Certificates of Airworthiness and Permits to Fly8 min
- 6EASA Form 1 and FAA Form 8130-3 Acceptance7 min
Licensing and training
The people who sign for the aircraft and fly it — the engineer and flight-crew licences, and the training organisations that qualify and examine them.
EASA Part-66 Aircraft Maintenance Licence
5 guides · 39 minThe EASA Part-66 aircraft maintenance licence under Regulation (EU) No 1321/2014 — licence categories and privileges, the basic-knowledge module examinations, experience routes and application evidence, and keeping the licence valid through type ratings and renewal.
EASA Part-147 Maintenance Training Organisations
3 guides · 13 minThe EASA Part-147 maintenance training organisation under Regulation (EU) No 1321/2014 — approval, the MTOE and privileges, basic training and knowledge examinations, aircraft type and task training, with a link to the Part-66 experience and application guide.
EASA Flight Crew Licensing
5 guides · 30 minFlight crew licensing under Part-FCL of Regulation (EU) No 1178/2011 — the LAPL, PPL, CPL, MPL and ATPL licence ladder, theoretical-knowledge exams and the skill test, class, type and instrument ratings, and keeping the licence valid through revalidation, recency and medical.
Operations and safety
Running the operation and managing its safety and compliance — safety management and SPIs, audits and findings, air operator certification, occurrence reporting under Just Culture, and information-security management.
Safety Management Systems
2 guides · 34 minSafety management under the EASA management-system rules (145.A.200, CAMO.A.200 and ORO.GEN.200) — safety performance indicators and monitoring, hazard identification and safety risk management, with a worked SPI set and a worked risk register.
Audits, Findings and Compliance Monitoring
3 guides · 51 minHow EASA findings work and how organisations answer them — level 1 and level 2 findings and observations, root cause analysis and corrective action plans under 145.A.95, CAMO.A.150 and ORO.GEN.150, and the compliance monitoring audit programme.
EASA Air Operations
7 guides · 60 minCommercial air transport under Regulation (EU) No 965/2012 — the structure of Part-CAT and the operator's responsibilities, getting and holding an Air Operator Certificate, the operations manual and the Part-ORO management system, flight time limitations and crew, the Part-SPA specific approvals that extend an operator's privileges, and ramp inspection (SAFA/SACA) findings and the operator's reply.
- 1EASA Air Operations: Rules, AOC and Duties6 min
- 2Apply for an EASA Air Operator Certificate7 min
- 3Part-ORO Operations Manual and Management System5 min
- 4EASA Flight Time Limitations and Crew Duty14 min
- 5Part-SPA Specific Approvals: LVO, PBN, ETOPS5 min
- 6SAFA Ramp Inspection Findings: Categories 1 to 316 min
- 7MEL Rectification Interval Extension (RIE)7 min
EASA Occurrence Reporting
5 guides · 32 minOccurrence reporting under Regulation (EU) No 376/2014 — what to report, the 72-hour deadline and data quality, Just Culture protection for reporters, and closing the loop through analysis and follow-up in your SMS.
Part-IS Implementation
4 guides · 35 minImplementing the EASA information-security regulations — (EU) 2022/1645 and (EU) 2023/203 — in maintenance, CAMO and operations organisations: from first concepts to shop-floor practice.