How to study for Part-66 exams

Your own authority’s. EASA and the UK CAA examine the same thirteen subjects for B1.1, but the syllabus differs across nine of the modules, because EASA amended Part-66 in 2024 and again in 2026 and the UK adopted neither change. Studying the wrong one costs you marks on topics your paper does not set, and misses topics it does. Check which authority and which text a book or a question bank was written to before you rely on it.

Every difference between EASA and the UK CAA

Neither text sets an order that we can find, so the order is yours to plan. The modules build on each other: the numbering systems in Module 1 are what Module 5 reads, and the circuits in Module 3 are what Modules 4 and 5 build on, so the foundations are worth sitting early. The one rule to plan around is the 10 year life of a pass, which counts back from the day you apply for the licence and runs module by module, under EASA and the UK CAA alike.

How long a module pass lasts, and what it means for the order

By the paper and by the levels, not by how hard a topic feels. Under EASA the papers run from 20 questions (Module 4) to 140 (Module 11), so one paper can be several times the work of another. Inside each module, Appendix I gives every topic a knowledge level of 1, 2 or 3. A level 1 topic asks you to recognise and describe it; a level 3 topic asks you to work with it, combining the parts and applying them.

What the three knowledge levels meanWhich modules carry the most level 3 material

Practise in the exam’s own shape: three answers, one of them correct, with about 75 seconds for each question, which is the time Appendix II allows. Penalty marking is not used to decide a pass, so a blank costs you the same as a wrong answer: never leave one. Read the explanation every time, including when you were right, because a right answer for the wrong reason will not hold on the day.

On the paper itself, Appendix II requires the wrong options in a numerical question to correspond to procedural errors, such as a correction applied in the wrong sense or a unit converted the wrong way, so on the day the option that tempts you usually names the mistake you are making.

Rereading a page tells you it looks familiar. Writing it from memory tells you whether you know it. Two ways to practise recall: fill in a missing word or term with no options to pick from, and blurting, where you read a section until you think you have it, hide it, write down everything you can remember, and then check what you missed. Both are slower than rereading, and both show you exactly where the gaps are.

When you can pass a full timed paper you have not seen, with some margin, rather than when the material feels familiar. The pass mark is 75% on every module, so on the 140 questions of Module 11 you need 105 right and can drop 35. Sit a full length mock at the real time before you book, and go back over every question you got wrong. The wait after a failed module is 90 days, or 30 only after tailored retraining at a Part-147 approved organisation, so booking a week too early can cost you three months.

Resit waits and attempt limits

Every module page has its own study section, written for that paper.

This page answers one part of the B1.1 route in full. The rest of the guide covers the others.