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EASA Part-66 Essays 60 worked answers Modules 7, 9 & 10

EASA Part-66 Essay Questions — How They Work, with 60 Worked Model Answers

Some EASA Part-66 basic-knowledge modules are examined partly by written essay, not just multiple choice. This page explains how the essay exam works — the format, timing and the 75% Key-Points pass mark — and links to 60 worked model answers across Modules 7, 9 and 10.

Which modules have essays today? Under Commission Implementing Regulation (EU) 2023/989 (in force 12 June 2024), only Module 7 (Maintenance Practices) still carries essay questions in the EASA exam. The Module 9 and Module 10 essays were removed and those modules are now multiple-choice only. UK CAA retained the earlier standard, so UK candidates are still examined by essay on Modules 7, 9 and 10.

These are example essays for study — not the actual exam questions. Your real exam will use different question wording drawn from the official question bank, so it will not match these word-for-word. Use them to learn how to structure a passing answer and which Key Points to cover — not to memorise.

How Part-66 essay questions work

The essay standard is set in Appendix II (Basic Examination Standard) to Part-66. The headline rules:

20 minutes each

You write a full prose answer to each essay question; the standard allows 20 minutes per essay, on top of the multiple-choice time. The exam is closed-book.

75% of the Key Points

Each question has a model answer broken into Key Points. To pass you must cover 75% of the required key points with no significant error on any required point.

60% content / 40% style

Marking weights the technical content (the Key Points) at about 60% and the way the report is written — clarity, structure, technical language — at about 40%.

Write in prose

Answer in continuous prose — the guidance says the report must not be indexed, itemised or listed. Build a logical opening, body and conclusion in correct technical language.

How to write it. Use full sentences and paragraphs, not bullet points. Open by framing the subject, develop the argument logically to a conclusion, and use correct terminology throughout. Diagrams should only supplement a written answer, never replace it, and you are not heavily penalised for occasional spelling slips — the marks are for covering the key points clearly.

Module 7 — Maintenance Practices Essay Questions

EASA: examined by essay

20 worked model answers — open the full module →

7.1 Oxygen system safety precautions 7.1 Fire extinguishing agents and their application 7.3 Use and care of precision measuring tools 7.6 Classes of fits and clearances 7.7 EWIS crimped joints 7.7 Wire protection and routing techniques in EWIS 7.8 Riveted joints, rivet spacing and pitch, riveting and dimpling tools, and inspection 7.9 Aircraft pipes and hoses: forming, inspection, testing and installation 7.11 Bearings: testing, cleaning, inspection, lubrication and defects 7.13 Control cables: swaging of end fittings, inspection and testing 7.14.1 Sheet metal - marking out and calculation of bend allowance, bending/forming, and inspection 7.14.2 Composite and bonded structure repair - environmental conditions for bonding/repair and inspection methods 7.16(b) Aircraft weighing - preparation of the aircraft and the weighing procedure 7.17 Aircraft jacking - safety precautions and procedure 7.17 Refuelling and defuelling - procedures and safety precautions 7.17 De-icing and anti-icing procedures (ground de-icing/anti-icing of aircraft) and associated precautions 7.18(a) Corrosion - removal, assessment and re-protection; types of defects and visual inspection 7.18(c) Non-destructive inspection methods - compare dye penetrant, eddy current and ultrasonic inspection 7.19(a) Inspection of an aircraft following a lightning strike / HIRF penetration 7.21 Content of a written maintenance report and effective shift/task handover communication

Module 9 — Human Factors Essay Questions

EASA: MCQ only since 2024 · UK CAA: essay

20 worked model answers — open the full module →

9.1 The need to take human factors into account; incidents attributable to human error; Murphy's law 9.2 Vision and its limitations as they affect the aircraft maintenance engineer's inspection work 9.2 Memory - types and limitations of human memory and their effect on maintenance tasks 9.2 Information processing, attention and perception in maintenance 9.3 Peer pressure - what it is and how an engineer should resist it 9.3 Team working, supervision and leadership in a maintenance organisation 9.4 Stress (domestic and work-related) - effects on performance and how it is managed 9.4 Sleep, fatigue and shiftwork - effects on the maintenance engineer and mitigation 9.4 Alcohol, medication and drug abuse - effects on fitness to work and the engineer's responsibilities 9.4 Workload - the effects of overload and underload on human performance 9.5 The physical environment - noise, illumination, climate/temperature, motion/vibration and fumes, and their effect on the engineer 9.6 Visual inspection and repetitive tasks - the human-factors limitations and how to manage them 9.7 Communication within and between teams/shifts; work logging and recording 9.8 Human error - error models and theories, and the types of error seen in maintenance tasks 9.8 Avoiding and managing maintenance errors - error-capture defences and error management 9.9 Just culture and occurrence reporting -- what they mean and why they matter in maintenance 9.9 Risk management and hazard identification in a maintenance organisation 9.10 The 'Dirty Dozen' -- an overview of the twelve common maintenance-error preconditions 9.10 Complacency and lack of awareness (two of the Dirty Dozen) -- causes and countermeasures 9.10 Risk-mitigation methods and safety nets used to defend against the Dirty Dozen

Module 10 — Aviation Legislation Essay Questions

EASA: MCQ only since 2024 · UK CAA: essay

20 worked model answers — open the full module →

10.1 The roles of ICAO, the European Commission, EASA, and the Member States / National Aviation Authorities 10.1 Hard law vs soft law -- the relationship between Regulations and AMC/GM/CS 10.2 Part-66 licence categories and subcategories (A, B1, B2, B2L, B3, C) and their privileges 10.2 The Certificate of Release to Service (CRS) -- when it is required, who may issue it, and its content 10.2 Basic experience requirements and recency for Part-66 certifying staff 10.3 Part-145 approved maintenance organisations - approval requirements and procedures 10.3 The Accountable Manager - role and responsibilities in a Part-145 organisation 10.3 The EASA Form 1 (Authorised Release Certificate) - purpose and use 10.3 Maintenance records - what must be kept and retention requirements 10.4 Independent certifying staff - privileges, responsibilities and limitations 10.5 The Minimum Equipment List (MEL) and Configuration Deviation List (CDL) — purpose and use 10.5 The documents that must be carried on board an aircraft 10.5 The Aircraft Technical Log — purpose, content and use 10.6 Type Certificate, Type Certificate Data Sheet (TCDS) and Supplemental Type Certificate (STC) 10.6 The Certificate of Airworthiness and the Permit to Fly 10.7 Airworthiness Directives (ADs) - what they are and why compliance is mandatory; relationship to Service Bulletins 10.7 The Aircraft Maintenance Programme (AMP) - content, approval and amendment 10.7 Part-CAMO - role, responsibilities and issuance of the Airworthiness Review Certificate (ARC) 10.8 Oversight principles in continuing airworthiness - compliance monitoring and competent-authority oversight 10.10 Cybersecurity in aviation maintenance - Part-IS and information-security management

Practise the multiple-choice side too

The essays are only part of the exam. Test yourself on thousands of real Part-66 multiple-choice questions for every module — each with a worked explanation.

Try a free demo quiz Get full access See the exam structure

Sources

  • Regulation (EU) No 1321/2014, Annex III (Part-66), Appendix II — Basic Examination Standard (essay format, 20-minute timing, 75% Key-Points pass mark, report-style marking).
  • Commission Implementing Regulation (EU) 2023/989 — updated Part-66, applicable 12 June 2024 (removed the Module 9 and 10 essays from the EASA exam).
  • Worked model answers are written to the Appendix II standard and independently fact-checked against the EASA Part-66 syllabus. They are study aids, not official exam questions.

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