How to Pass Part-66 Module 7 — Maintenance Practices (and its Essay)
Module 7 is different from every other Part-66 module: it is the only one that keeps a written essay under current EASA rules, and GCAA examines it by essay too. That makes it the module where exam technique — not just knowledge — decides whether you pass. Here is how to prepare for both halves.
What Module 7 covers
Module 7, Maintenance Practices, is the practical heart of the licence: safety precautions for aircraft and workshop, tools and their calibration, engineering drawings and the ATA 100 chapter system, fits and clearances, electrical wiring interconnection, riveting, pipes and hoses, springs, bearings, transmissions and control cables. It continues into welding, brazing and soldering, aircraft weighing and centre-of-gravity, jacking and towing, disassembly, inspection and repair, abnormal events such as heavy landings and lightning strikes, and the certificate of release to service.
The essay — the part candidates fear
Under EASA, Regulation (EU) 2023/989 left Module 7 as the only essay module: every category writes two essays in 40 minutes alongside the multiple-choice paper, and GCAA examines it the same way. Essays are not marked against a single right answer — an examiner works through a list of key points and awards marks for those you cover, with correct terminology, clear structure and the safety-critical points all carrying weight. You must reach 75% of the available marks.
The practical implication is that you have about 20 minutes per essay, so a plan matters. Open with a clear definition, cover the discrete points in a logical order, use correct engineering terms, and never omit the safety-critical points — isolate before you disconnect, the correct fire class and agent, the correct gas, and so on.
Key topics to master
- Classes of fire and the correct extinguishing agent for each
- High-pressure gas and oxygen-system hazards and precautions
- Fits, clearances and the calibration and control of tools
- Riveting, electrical bonding and crimping
- Aircraft weighing and centre-of-gravity
- Jacking safety and inspection after abnormal events
- The certificate of release to service and life-limited parts
How to study for both papers
For the multiple-choice paper, use notes, mind maps and question banks as with any module. For the essays, practise writing them: read a model answer, note the examiner's key points, then write your own answer and self-mark against those points. Doing this a dozen times builds the structure and terminology you need under time pressure — which is exactly why Certify66 gives every Module 7 essay a full model answer and a key-point checklist to mark against.
Study Maintenance Practices on Certify66
Notes, mind maps, interactive simulations, question banks and timed mock exams.