EASA PART 145 TRAINING PACK
Civil Aviation | Line and Base Maintenance Focus
Module 1: Introduction to EASA Part 145
EASA Part 145 is a foundational regulation that governs the approval and oversight of maintenance
organisations responsible for ensuring aircraft airworthiness. It originates from Commission Regulation
(EU) No 1321/2014, specifically Annex II (Part-145), and applies to both line and base maintenance
operations.
This regulation ensures that aircraft registered in EASA member states are maintained to a consistent,
high standard. Part 145 must be understood in relation to: - Part-M/Part-CAMO: for continuing
airworthiness - Part-66: for certifying staff licensing - Part-21: covering design and production
organisations
Module 2: Approval Requirements
To operate under EASA Part 145, organisations must meet specific criteria:
• Organisational Structure: Must include an Accountable Manager, nominated post holders for
key functions (e.g., Maintenance, Quality), and clear reporting lines.
• Ratings Categories:
• A – Aircraft
• B – Engines
• C – Components (excluding complete engines or APUs)
• D – Specialised Services (e.g., NDT)
• Facilities:
• Suitable environments for maintenance activities (e.g., hangars for base maintenance, ramps for
line maintenance)
• Secure storage and controlled access areas for parts and tools
• Maintenance Organisation Exposition (MOE):
• A detailed, controlled document describing procedures, structure, scope, and compliance
approach
• Subject to approval by the competent authority
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Module 3: Personnel Requirements
Personnel competence is critical in ensuring compliance and safety:
• Certifying Staff:
• Must hold a valid EASA Part-66 licence
• Require relevant type ratings and internal company authorisation
• Support Staff:
• Assist maintenance work but do not certify release to service
• Human Factors Training:
• Mandatory initial and recurrent training
• Covers communication, fatigue, teamwork, stress management, and error prevention
• EWIS & Fuel Tank Safety Training:
• Required for personnel working on electrical wiring and fuel systems
• Competency Assessment:
• Conducted during hiring, periodically, and after major role changes
• Records must be retained and kept up to date
Module 4: Maintenance Standards
Maintenance activities must be performed according to approved data and defined standards:
• Approved Data:
• Includes AMM, CMM, SRM, IPC, SBs, and ADs
• Must be current, complete, and traceable
• Work Orders and Instructions:
• Must be clear, comprehensive, and linked to specific maintenance tasks
• Execution of Maintenance:
• As per procedures outlined in the MOE
• Utilisation of calibrated tools and authorised personnel
• Maintenance Documentation:
• Includes work cards, task sheets, and aircraft technical logs
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• Technical Recordkeeping:
• Entries must be legible, signed, dated, and retained per regulatory requirements
Module 5: Tools, Equipment, and Calibration
An effective tool control system ensures safety and accuracy:
• Tool Control:
• Accountability for all tools used
• Procedures for reporting and resolving missing tools
• Calibration:
• Routine calibration for measuring/test equipment
• Must be traceable to national/international standards
• Storage and Access:
• Tools should be securely stored, with access controlled to prevent misuse
• Hired or Loaned Tools:
• Must be verified for calibration and suitability before use
Module 6: Certificate of Release to Service (CRS)
The CRS is the legal document confirming the aircraft or component is fit for release:
• Issued By:
• Only authorised certifying staff
• Conditions for Issuance:
• Completion and verification of all required tasks
• Content Requirements:
• Reference to work order, signature, date, and authorisation number
• Common Errors:
• Failing to record completed tasks properly
• Omission of key information
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Module 7: Recordkeeping
Proper recordkeeping ensures traceability and compliance:
• Types of Records:
• Maintenance records, staff authorisations, training certificates, calibration records
• Retention:
• Maintenance: Minimum 3 years
• Personnel & quality records: Often longer
• Storage Options:
• Physical, scanned, or digital systems
• Controls:
• Secure storage, restricted access, regular backups
Module 8: Subcontractors & Contracts
Use of subcontractors must be controlled and documented:
• Scope:
• Includes specialised tasks like NDT, calibration, or component overhaul
• Approval Routes:
• Direct Approval: Listed in MOE and under direct oversight
• Indirect Approval: Under the quality control system of the primary organisation
• Control Methods:
• Periodic audits, contract reviews, technical evaluations
Module 9: Quality System & Internal Audits
A robust quality system ensures continued compliance:
• Quality System Design:
• Should ensure compliance with Part 145 and internal MOE procedures
• Compliance Monitoring:
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• Managed by a dedicated Quality/Compliance Monitoring Manager
• Must be independent of maintenance delivery
• Audit Programme:
• Must cover all functions and be regularly updated
• Non-Conformity Management:
• Includes analysis, corrective actions, preventive actions
• Effectiveness of actions must be verified
Module 10: Occurrence Reporting & Safety
Proactive safety management is essential to airworthiness:
• Mandatory Reporting:
• Per EU Regulation 376/2014 (e.g., defects, failures, etc.)
• Voluntary Reporting:
• Encouraged to enhance safety culture
• Reporting Systems:
• May include ECCAIRS, internal SMS portals, paper-based forms
• Safety Management System (SMS):
• Combines proactive, reactive, and predictive safety measures
• Involves safety policy, risk assessments, performance monitoring
• Just Culture:
• Promotes transparent reporting without fear of reprisal, except in cases of gross negligence
This document is the expanded and detailed foundation of your EASA Part 145 training pack. A
PowerPoint presentation can now be structured using this content with visual aids, diagrams, trainer
notes, and interaction prompts.
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