EASA Part-145

EASA Part-145
Name	EASA Part-145
Jurisdiction	European Union Aviation Safety Agency
Subject	Maintenance organisation approval for aircraft and components
Established	2003 (as part of EASA introducion)
Related	EASA, ICAO, FAA, JAA

EASA Part-145

EASA Part-145 is the European regulatory standard for approved maintenance organisations responsible for the maintenance, preventive maintenance, and alterations of aircraft and aeronautical products. It provides detailed requirements for certification, organisational arrangements, personnel qualifications, facilities, procedures, and quality systems to ensure continuing airworthiness across civil aviation sectors. The regulation interfaces with international frameworks and national aviation authorities to support safety, interoperability, and global maintenance practices.

Overview and Scope

Part-145 defines requirements for maintenance organisations that perform line maintenance, base maintenance, component maintenance, and overhaul activities on large and small aeroplanes, helicopters, engines, propellers, and avionics. The scope covers interfaces with airworthiness directives, airworthiness review certificates, and continuing airworthiness management, and it applies to both commercial air transport and non-commercial operators. It intersects with rules and programmes elaborated by the European Union, European Commission, European Aviation Safety Agency, International Civil Aviation Organization, Federal Aviation Administration, Civil Aviation Authority (United Kingdom), and national authorities such as the Directorate General of Civil Aviation (France), Luftfahrt-Bundesamt (Germany), AESA (Spain), ENAC (Italy), and Transport Canada Civil Aviation. Part-145 approvals are often sought by major maintenance, repair and overhaul providers including firms operating at hubs like Heathrow Airport, Frankfurt Airport, Charles de Gaulle Airport, and Amsterdam Airport Schiphol.

Certification and Approval Requirements

Organisations must apply for approval demonstrating compliance with technical requirements, manuals, facilities, tooling, and records systems. Regulators assess maintenance data sources, certification procedures, capability lists, and security arrangements. The approval process references standards and guidance material developed in cooperation with bodies such as European Organisation for the Safety of Air Navigation, Joint Aviation Authorities, International Air Transport Association, Airbus, Boeing, Rolls-Royce, Pratt & Whitney, and Safran. Applicants must show conformity with legislative instruments including directives and implementing rules produced by the European Parliament, Council of the European Union, and EASA executive decisions. Certificates indicate ratings for specific types, ratings for components, and limitations aligned to training and tooling demonstrated to authorities like the Civil Aviation Authority (United Kingdom) and the Federal Aviation Administration when seeking bilateral recognition.

Organization, Personnel, and Training

Part-145 requires a defined organisational structure with accountable managers, certifying staff, and support personnel. Key roles include the Accountable Manager, Maintenance Manager, and Certifying Staff, each expected to meet competency and experience standards comparable to guidance from European Centre for Aviation Training, International Federation of Airworthiness, and professional organisations such as Royal Aeronautical Society. Training programmes must cover type-specific courses from Original Equipment Manufacturers like Airbus, Boeing, Bombardier, Embraer, and systems suppliers including Honeywell, Thales, Rockwell Collins, and UTC Aerospace Systems. Human factors training often references research by institutions such as Imperial College London, TU Delft, University of Cambridge, and safety work by Eurocontrol.

Maintenance Processes and Continuing Airworthiness

Organisations must establish procedures for maintenance planning, release to service, defect rectification, non-routine tasks, and component change management. The regulation requires use of approved data from OEMs, service bulletins, repair design approvals, and airworthiness directives issued by authorities like EASA, FAA, and national agencies. Maintenance practices intersect with programmes such as scheduled maintenance checks (A, B, C, D), engine shop visits, structural repairs, and avionics upgrades widely practised at facilities in cities like Munich, Madrid, Rome, and London. Maintenance records and life-limited part control link to registries managed by bodies including ICAO, IATA, and national registries. Supply chain control references major suppliers and MRO networks including SR Technics, Lufthansa Technik, SIA Engineering Company, and independent overhaul shops.

Quality Assurance, Safety Management and Compliance Monitoring

Part-145 mandates an internal Quality Assurance system, safety reporting, occurrence investigation, and corrective action processes aligned with Safety Management Systems advocated by ICAO, EASA, IATA Operational Safety Audit, and ISO standards. Audits, trend analysis, and surveillance enable compliance monitoring with oversight from authorities such as Austro Control, EASA National Supervisory Authorities, and inspectors trained under programmes from institutions like European Union Aviation Safety Training Academy. Organisations track safety data, implement corrective actions, and maintain records for external audits and ramp inspections at airports including Gatwick, Orly, and Barcelona-El Prat.

Privileges, Limitations and Operator Relationships

Approvals grant privileges to certify aircraft releases to service and to perform approved maintenance within defined ratings and geographic limitations; constraints may apply for specialised tasks such as structural repairs, heavy maintenance, or engine disassembly. Relationships between Part-145 organisations and operators, lessors, and CAMOs involve contracts, delegated responsibilities, and continuing airworthiness agreements common among carriers like Ryanair, Lufthansa, Air France, KLM, British Airways, and low-cost operators. Coordination with lessors and manufacturers often requires acceptance of supplemental type certificates and major modification approvals from organisations such as EASA, FAA, and OEM technical authorities.

International Recognition and Regulatory Context

Part-145 approvals are often subject to bilateral agreements, validation, and mutual acceptance arrangements with jurisdictions including the United States Department of Transportation, Transport Canada, Civil Aviation Administration of China, Civil Aviation Administration of India, and regional authorities in Africa, Asia-Pacific and the Middle East. International frameworks such as ICAO Annexes, EU regulations, and global industry standards influence convergence, while trade, cross-border MRO investments, and multinational carriers necessitate alignment with standards used by Boeing Global Services, Airbus Services, and international MRO consortia. Continuous regulatory updates reflect developments from EASA rulemaking, safety recommendations by agencies like National Transportation Safety Board, and harmonisation efforts with partners including the FAA and TC (Transport Canada).

Category:Aviation maintenance