EASA Part-66 Module Exam Study Guide: Pass the 17 Basic Knowledge Modules

Understanding the EASA Part-66 Exam Landscape

Before diving into study strategies, it is essential to understand exactly what you are up against. The EASA aircraft maintenance licensing system is defined by Regulation (EU) No 1321/2014, Annex III (Part-66). The basic knowledge syllabus in Appendix I organises everything into 17 modules — M1 Mathematics through M17 Propeller — each covering the knowledge elements that define the profession. Knowledge levels 1, 2, and 3 (overview, detailed, in-depth) tell you how deeply each subject must be studied for your licence category.

The module exams are computer-based, multiple-choice, and administered at approved examination centres run by maintenance training organisations (MTOs) or national aviation authorities. The pass mark is 75 percent for all modules (66.A.25), a failed module requires a 30-day wait before retaking, and a maximum of three consecutive attempts is allowed per module before a 12-month wait. Each attempt requires additional fees, and repeated failures can delay your career by months. Thorough preparation on your first attempt is always the most cost-effective approach. After passing the modules, your module certificates remain valid for 10 years — use that window to complete the experience requirement and apply to your national aviation authority for the licence.

If you are comparing licensing paths, remember the experience requirement of 66.A.30: two years for category A and B3, four years for B1.2 (reduced to three with recognised training), and five years for B1.1, B1.3, B1.4 and B2 (reduced to three with a recognised technical diploma, or two with a technician licence). Many candidates work as apprentices under certifying staff while studying for the module exams, which makes the material far easier to absorb.

The Module Exams at a Glance

For a detailed breakdown of exam structure across all 17 modules, see our module exam structure guide. For specific module FAQs, explore our airframe exam FAQ and powerplant exam FAQ.

Proven Study Strategies for the Module Exams

1. Start with the Part-66 Syllabus (Appendix I)

The Appendix I knowledge syllabus is your roadmap. It lists every knowledge element you will be tested on, organised by module, with the depth level required for each licence category. Before you open a single textbook, review the syllabus for your category cover to cover. Understand the weight of each module — a module with many knowledge elements at depth level 3 (like M7 or M15) deserves far more of your time than a short overview module.

2. Use Active Recall, Not Passive Reading

Passive reading — simply reviewing notes or textbooks — is one of the least effective study methods. Active recall — forcing your brain to retrieve information from memory — is dramatically more effective for long-term retention. Every study session should include a significant active recall component: answering practice questions, reciting procedures from memory, or explaining a system to a study partner without referring to notes.

This is where platforms like Skylicence Europe excel. Our AI generates practice questions at calibrated difficulty levels based on your performance, forcing continuous active recall. The more questions you answer, the stronger your memory becomes. 4,464 questions are available across the 17 modules, aligned to the Part-66 knowledge elements.

3. Implement Spaced Repetition

Spaced repetition is the practice of reviewing material at increasing intervals over time. Content you learned yesterday should be reviewed today, then in three days, then in a week, then in two weeks. This technique exploits the psychological spacing effect — your brain encodes information more deeply when it is retrieved just before you would have otherwise forgotten it.

Skylicence Europe's adaptive learning engine implements spaced repetition automatically. The AI tracks which questions you answered correctly and when, scheduling reviews at optimal intervals. Topics you master are surfaced less frequently, while weak areas are revisited more often.

4. Study the Syllabus and Legislation, Not Just Question Banks

Question banks alone are not enough. EASA writes exam questions from the knowledge elements defined in Part-66 Appendix I, supported by the regulatory framework — Regulation (EU) No 1321/2014 (Part-66, Part-145, Part-M/CAMO) and the EASA AMC/GM. Read the syllabus sections that correspond to your current study topic, then reinforce with practice questions. The syllabus and its supporting material explain the "why" behind the answers, which is exactly what scenario questions reward.

5. Practice with Timed Simulations

The real exams are timed: 32 questions in 40 minutes for M1, 92 in 115 minutes for M3, 140 in 175 minutes for M7 — roughly 1.25 minutes per question across the board. Practising under timed conditions is essential for two reasons: it builds speed, and it reduces anxiety on exam day because the environment feels familiar.

Skylicence Europe includes full-length timed exam simulations that replicate the approved examination centre environment, including the same question quotas, time limits, and 75 percent pass mark. Use these simulations to gauge your readiness and identify which modules need additional preparation time.

Time Management During Study

Most Part-66 candidates are studying while working full-time at a maintenance organisation, airline, or MTO programme. Time is your most precious resource. Here is how to maximise it:

• Schedule dedicated blocks — 60–90 minute study sessions are ideal. Shorter than 60 minutes and you barely get into a flow state. Longer than 90 minutes and retention drops off sharply. Block out specific times in your calendar and treat them as non-negotiable.
• Study in the morning — Cognitive performance peaks in the morning for most people. If possible, schedule your most challenging topics for the first session of the day when your brain is freshest.
• Use commuting time — Audio recordings, flashcards, and quiz apps can turn otherwise wasted commute time into productive study sessions. Skylicence Europe is mobile-friendly, so you can practice questions on your phone during transit.
• Take strategic breaks — The Pomodoro Technique (25 minutes of focused study, 5-minute break) works well for many learners. The key is taking breaks before mental fatigue sets in.
• Review before bed — Light review of key concepts just before sleep can improve memory consolidation. Spend 10 minutes reviewing flashcards or scanning a chapter summary before you go to sleep.

Understanding Question Types

The EASA module exams use multiple-choice questions with one correct answer and distractors, plus essay questions on M7, M9, and M10 for B1 and B2 categories. However, the questions fall into several distinct categories. Recognising the question type helps you approach each one strategically:

• Recall questions — "What is the minimum edge distance for a rivet in 0.040-inch aluminium alloy sheet per standard maintenance practice?" These test direct knowledge of standard values. If you have memorised the key tables, these are easy points.
• Application questions — "A pilot reports that the right landing gear indicates unsafe during retraction. What is the most likely cause?" These require you to apply your knowledge to a real-world scenario and test diagnostic reasoning.
• Regulatory questions — "Per 66.A.20, what privileges does a category A licence holder have?" These test your ability to recall and apply the regulations accurately.
• Calculation questions — "If a battery has a capacity of 35 amp-hours and the continuous load is 7 amps, what is the maximum theoretical runtime?" These are most common in M1, M3, and M6 and require solid math skills.
• Figure/identification questions — These use drawings or diagrams (wiring schematics, engine components, hydraulic symbols) and ask you to identify a component or interpret the figure.

Skylicence Europe's question bank covers all five question types, with detailed explanations for every answer. The AI Tutor can also generate custom practice questions on any topic, helping you drill specific question formats you find challenging.

Essential Reference Materials

The EASA module exams are based on specific reference documents. Familiarity with these resources is critical:

• Part-66 Appendix I (Basic Knowledge Syllabus) — The definitive outline of what you will be tested on, including knowledge levels 1–2–3 per licence category. Study the syllabus first, then use it to guide your preparation.
• Part-66 Appendix II (Examination Standard) — Official question quotas, time limits, and pass-mark rules for every module.
• Regulation (EU) No 1321/2014 (Part-66, Part-145, Part-M/CAMO) — Licensing, maintenance organisation, and continuing airworthiness rules. Essential for M10 Aviation Legislation.
• EASA AMC/GM — Acceptable Means of Compliance and Guidance Material supporting the regulations, referenced throughout the technical modules.
• Module textbooks used by MTOs — EASA-aligned training manuals covering each module in depth, with diagrams and worked examples.
• Aircraft Maintenance Manuals (AMM) and CMMs — Manufacturer-specific procedures. Familiarity with reading and interpreting them is essential for your practical career as certifying staff.

Common Mistakes and How to Avoid Them

Over years of helping Part-66 candidates prepare, we have identified the most common mistakes that lead to exam failures. Avoid these pitfalls:

• Mistake 1: Cramming instead of consistent study. Aviation maintenance knowledge is cumulative. Cramming the week before the exam might work for a school test, but it will not work for the module exams. The volume of material requires months of consistent, spaced study. Start at least 2–3 months before your target exam date.
• Mistake 2: Memorising answers instead of understanding concepts. Some candidates try to memorise question-answer pairs from old question banks. This is risky because EASA updates exam questions, and the essay questions on M7, M9, and M10 will probe your understanding. Understanding the underlying concept — why a particular answer is correct — ensures you can handle any variation.
• Mistake 3: Ignoring the practical side until after the exams. While this guide focuses on the module exams, do not neglect the experience and logbook requirements (66.A.30). Many candidates pass all their modules only to discover they lack documented experience. Integrate practical knowledge into your exam study — when you study a system, think about how you would troubleshoot it or document it in a logbook under certifying staff supervision.
• Mistake 4: Studying alone without feedback. Studying in isolation means you have no way to identify blind spots. A study partner, mentor, or AI-powered platform like Skylicence Europe provides external feedback that reveals what you do not know.
• Mistake 5: Not taking timed practice exams. The difference between knowing the material and passing under time pressure is significant. Candidates who only study without simulating exam conditions are often surprised by the time pressure on exam day. Take at least 3–5 full timed simulations per module before the real thing.
• Mistake 6: Overlooking figures and diagrams. The module exams include figure-based questions (figures are provided with the exam). Practice with diagrams — wiring schematics, hydraulic symbols, and engine cutaways — so interpreting them is second nature.

How Skylicence Europe Accelerates Your Preparation

Skylicence Europe is an AI-powered exam preparation platform purpose-built for the EASA Part-66 module exams. Unlike generic study tools, every feature is designed around the Part-66 Appendix I syllabus and the module exam structure:

• Complete Appendix I coverage — All 17 modules across the 8 licence categories with 4,464 questions. Every question is aligned to a specific Part-66 knowledge element.
• Adaptive learning engine — The AI continuously assesses your performance across all knowledge elements and adjusts question difficulty in real time. Strong areas are reviewed less frequently; weak areas get more attention.
• AI Tutor — Stuck on a concept? Ask the AI Tutor for an explanation in plain language. The tutor references the module syllabus and EASA regulations and provides exam-focused answers with concrete examples.
• Full exam simulations — Timed practice exams replicate the approved examination centre environment, including the official question quotas, time limits, and the 75% pass mark. Track your scores over time to measure readiness.
• Detailed performance analytics — See exactly how you are performing across every module and knowledge element. Identify your weakest areas with a single glance and focus your study time where it will have the most impact.
• Reference integration — Questions include references to the specific syllabus element, regulation, or AMC/GM section. You learn not just the answer but also where to find the source material — a critical skill for your career as certifying staff.

For a deeper look at how AI technology is transforming Part-66 exam preparation, read our guide to AI-powered Part-66 exam preparation.

Building Your Study Plan

A structured study plan is the difference between aimless studying and focused preparation. Here is a sample 10-week plan for a B1.1 candidate's core modules:

• Weeks 1–2: Foundations — Review the Appendix I syllabus for your category, then work through M1 (Mathematics), M2 (Physics), and M8 (Basic Aerodynamics). Take the diagnostic simulations on Skylicence Europe to establish your baseline.
• Weeks 3–4: Electrical and materials — Study M3 (Electrical Fundamentals), M4 (Electronic Fundamentals), and M6 (Materials and Hardware). Take timed simulations, scoring 80 percent or higher before moving on.
• Weeks 5–7: Maintenance practices and aeroplane systems — Work through M7 (Maintenance Practices) and M11 (Aeroplane Aerodynamics, Structures and Systems). Use Skylicence Europe adaptive learning to identify weak areas as you progress. Take chapter-by-chapter quizzes before moving on.
• Weeks 8–9: Legislation and propulsion — Study M10 (Aviation Legislation) plus M15 (Gas Turbine Engine) and M17 (Propeller) for B1.1, or M16 (Piston Engine) for B1.2. Take timed simulations for each.
• Week 10: Integrated review — Take full simulations for all modules, scoring 80 percent or higher before considering yourself ready. Review the Appendix I syllabus one final time to confirm every knowledge element is covered.

Adjust this plan based on your available study time. Candidates studying full-time can compress it to 6 weeks. Candidates studying part-time (10 hours per week) should extend it to 12–14 weeks. For a day-by-day schedule, see our EASA Part-66 study plan (30–90 days).

Exam Day Tips

When exam day arrives, these practical tips can help you perform at your best:

• Arrive early — Give yourself at least 30 minutes to check in at the examination centre, get comfortable, and settle your nerves. Bring valid identification — your national aviation authority requires a government-issued photo ID.
• Read each question twice — The most common exam-day mistake is misreading the question. Read it once to understand the scenario, then read it again focusing on what is actually being asked.
• Eliminate obviously wrong answers first — For each question, identify the answer choices that are clearly incorrect. This narrows your options and makes the correct answer more obvious.
• Flag and move on — If you are stuck on a question, flag it and move on. Answer the questions you know first, then return to flagged questions with whatever time remains. Unanswered questions are always wrong, so make sure you have answered everything you can.
• Trust your training — If you have followed a structured study plan and used active recall and spaced repetition, you know the material. Do not second-guess yourself excessively. Your first instinct is usually correct.
• Use the full time — Do not rush to finish early. Use any remaining time to review your answers, especially flagged questions. A second look often catches careless mistakes.

Additional Resources and Next Steps

Beyond this study guide, we have created several resources to support your Part-66 journey:

• Airframe Exam FAQ — Structures and systems content explained
• Powerplant Exam FAQ — Engine and propeller content explained
• EASA Part-66 Study Plan (30–90 Days) — A day-by-day schedule for your modules
• Study Techniques for EASA Module Exams — 10 proven techniques that work
• AI-Powered EASA Part-66 Exam Preparation — Leveraging technology to study smarter
• Aviation Maintenance Glossary — Essential terms every engineer should know

The path to your EASA Part-66 licence is demanding, but thousands of maintenance engineers have walked it before you — and succeeded. With the right strategy, the right tools, and consistent effort, you can too.

Start your EASA Part-66 exam preparation with Skylicence Europe free →