# PART66Online

> Online preparation platform for the EASA Part66 aircraft maintenance engineer
> licence (AML). 43,800+ practice questions covering the 18 EASA Part66 modules
> AND 7 aircraft type ratings (A320 CEO/NEO, A220, Boeing 737NG,
> 737NG→MAX differences, A320→A330 differences, Boeing 787). Used by AME candidates worldwide.

PART66Online targets trainees and licensed engineers preparing for or extending
an EASA Part66 licence. Examination structure follows EU Regulation (EU) 2023/989, as amended by (EU) 2025/111.
Every one of the 18,200+ Part66 module questions includes a worked explanation of why the answer is correct.
Practice questions, answer options and explanations can be read in English or any of 13 other languages (Chinese (Traditional), French, German, Greek, Hindi, Italian, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Turkish), with the English original always one click away on every question.
Free demo quiz; paid subscriptions from EUR 3.75/month.

## Conversion

- [Free Demo Quiz](https://www.part66online.com/sample-quiz/): publicly accessible sample questions, no account required
- [Free Part-66 Handbook](https://www.part66online.com/easa-part-66-handbook/): free ~280-page PDF guide covering licence categories, all 17 modules, exam format, experience/OJT, an 11-country comparison, aircraft type ratings and continuation training, plus 255 practice questions with explanations (email required for the download link)
- [Subscription](https://www.part66online.com/subscription/): plan options and pricing
- [Question Bank PDFs](https://www.part66online.com/question-bank/): downloadable practice banks

## For organisations (B2B)

- [For Business / Enterprise](https://www.part66online.com/business/): bulk team accounts for MROs, airlines and academies; managed EASA continuation-training compliance (Human Factors, SMS, Fuel Tank Safety, EWIS, Part-IS); question-bank content licensing via API; and a white-label exam platform for Part-147 organisations with Safe Exam Browser lockdown

## EASA Part66 (the 18 modules)

- [Module Syllabus](https://www.part66online.com/syllabus/): full topic breakdown for all 18 EASA Part66 modules
- [Licence Categories](https://www.part66online.com/categories/): A, B1, B2, B2L, B3 differences
- [Modularization](https://www.part66online.com/modules/): which of the 18 modules apply per category
- [Category A Modules](https://www.part66online.com/easa-part-66-a-modules/): which modules a Category A licence needs (A1-A4 split)
- [Category B1 Modules](https://www.part66online.com/easa-part-66-b1-modules/): the B1.1-B1.4 module list (13 modules for B1.1/B1.2, 12 for B1.3/B1.4)
- [Category B2 Modules](https://www.part66online.com/easa-part-66-b2-modules/): the 12 avionics modules (1-10 plus 13 and 14)
- [Category B3 Modules](https://www.part66online.com/easa-part-66-b3-modules/): the 13 modules for piston-engine non-pressurised aeroplanes
- [Subcategory B1.E Modules](https://www.part66online.com/easa-part-66-b1e-modules/): the 13 modules for aeroplanes with an electric power plant below 5 700 kg, including Module 18 (new under Regulation (EU) 2025/111, from 13 February 2026)
- [Experience Requirements](https://www.part66online.com/experience/)
- [On-the-Job Training (OJT)](https://www.part66online.com/easa-part-66-ojt/): OJT required for a first aircraft type rating (point 66.A.45(c) + Appendix III), and how the UK CAA, CASA, GCAA, Qatar, Singapore, Hong Kong, India and FAA compare
- [Licence Extension](https://www.part66online.com/extension/)
- [Exam Structure](https://www.part66online.com/examination/)
- [UK CAA Part-66 vs EASA](https://www.part66online.com/uk-caa-part-66/): how UK CAA Part-66 aligns with EASA after Brexit — same 17 modules, exams and 75% pass mark
- [CASA Part 66 (Australia)](https://www.part66online.com/casa-part-66/): Australia's CASR Part 66 — same 17 modules and 75% pass mark, self-study via Aspeq
- [GCAA CAR-66 (UAE)](https://www.part66online.com/uae-part-66/): UAE CAR-66 (Issue 09) modelled on EASA Part-66 — same module structure and categories
- [SAR-66 (Singapore)](https://www.part66online.com/singapore-part-66/): Singapore Airworthiness Requirements Part 66 — module-based exams, 75% pass mark
- [HKAR-66 (Hong Kong)](https://www.part66online.com/hong-kong-part-66/): Hong Kong HKAR-66 — JAR-66/Part-66 lineage, same categories and 75% pass mark
- [DGCA CAR-66 (India)](https://www.part66online.com/india-part-66/): India's DGCA CAR-66 (in force 2024) harmonized with EASA Part-66
- [KCAA (Kenya)](https://www.part66online.com/kenya-part-66/): Kenya's KCAA AME Licence Manual (2025) is closely modelled on EASA Part-66 — same 17 modules, A/B1/B2/B3/C categories and 75% pass mark
- [ECAA (Egypt)](https://www.part66online.com/egypt-part-66/): Egypt's national ECAA licence is ICAO-based, but a full EASA Part-66 route runs locally (EgyptAir is an EASA Part-147 academy)
- [NCAA (Nigeria)](https://www.part66online.com/nigeria-part-66/): Nigeria's NCAA licence is its own ICAO-based AMEL, but EASA/UK-CAA Part-66 module exams are sat inside Nigeria
- [FAA A&P vs EASA Part-66 (USA)](https://www.part66online.com/faa-a-and-p/): how the US FAA A&P (14 CFR Part 65) differs from EASA Part-66 — General/Airframe/Powerplant tests, 70% pass mark, no mutual recognition

## Aircraft type ratings

- [Airbus A320 - CEO](https://www.part66online.com/?mod=aircraft&type=2): 43 ATA chapters, ~4,451 practice questions
- [Airbus A320 - NEO](https://www.part66online.com/?mod=aircraft&type=3): 24 ATA chapters, ~2,406 practice questions
- [Airbus A220 (BD500)](https://www.part66online.com/?mod=aircraft&type=4): 42 ATA chapters, ~4,332 practice questions
- [Boeing 737NG](https://www.part66online.com/?mod=aircraft&type=5): 27 ATA chapters, ~4,384 practice questions
- [Boeing 737NG to MAX Diff](https://www.part66online.com/?mod=aircraft&type=6): 30 ATA chapters, ~3,194 practice questions
- [Airbus A320 to A330 Diff](https://www.part66online.com/?mod=aircraft&type=7): 23 ATA chapters, ~2,392 practice questions
- [Boeing 787 (GEnx)](https://www.part66online.com/?mod=aircraft&type=8): 34 ATA chapters, ~4,423 practice questions

## Study material

- [Study Notes](https://www.part66online.com/study-notes/): topic-level notes for all 17 modules
- [Essay Questions](https://www.part66online.com/easa-part-66-essay-questions/): how Part-66 essay questions work, the Appendix II marking standard, and 60 worked example questions (Modules 7, 9, 10)
- [Essay Practice (AI-marked)](https://www.part66online.com/essay-practice/): write a Part-66 essay under exam conditions and have it marked in seconds against the examiner Key Points - 20 minutes, 75% of the Key Points to pass, content and style weighted 60/40; Exam, Tutor (coached rewrite) and Study modes, with the Key Points you keep missing tracked across attempts

## EASA Part-145 Continuation Training (for licensed engineers)

- [Continuation Training](https://www.part66online.com/easa-continuation-training/): mandatory EASA Part-145 recurrent training online - Human Factors (incl. SMS), Fuel Tank Safety (CDCCL), EWIS and Information Security (Part-IS); certificated, mapped to the AMC, 75% MCQ exam, 2-year certificate; independent provider (no Part-147 approval required)
- [Human Factors Training](https://www.part66online.com/human-factors-training-online/): EASA HF and SMS continuation training, Initial and Continuation, mapped to AMC/GM to 145.A.30(e)
- [Fuel Tank Safety Training](https://www.part66online.com/fuel-tank-safety-training/): EASA Fuel Tank Safety Phase 2 (CDCCL) training, mapped to Appendix IV to AMC5 145.A.30(e)
- [EWIS Training](https://www.part66online.com/ewis-training-online/): EASA EWIS Target Group 1-2 training, mapped to AMC 20-22
- [Part-IS Information Security Training](https://www.part66online.com/easa-part-is-training-online/): EASA Part-IS information security awareness training (Reg (EU) 2023/203, Part-IS.I.OR - applies to Part-145/CAMO/CAO from 22 Feb 2026), mapped to IS.I.OR.240(g); Initial and Continuation

## Community

- [Q&A Forum](https://www.part66online.com/qa/): discussion threads by topic

## Technical

- [Full content corpus](https://www.part66online.com/llms-full.txt): deep reference content for citation
- [Sitemap](https://www.part66online.com/sitemap.xml)
- [robots.txt](https://www.part66online.com/robots.txt)

## Policies

- [Policies and Terms - terms of sale, refunds, privacy, IP, delivery](https://www.part66online.com/policy/)