# PART66Online

> Online preparation platform for the EASA Part66 aircraft maintenance engineer
> licence (AML). 43,500+ practice questions covering the 17 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.
Every one of the 17,900+ Part66 module questions includes a worked explanation of why the answer is correct.
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
- [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 17 modules)

- [Module Syllabus](https://www.part66online.com/syllabus/): full topic breakdown for all 17 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 17 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
- [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
- [Training Notes](https://www.part66online.com/training-notes/): supplementary training material

## 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

- [Terms](https://www.part66online.com/terms/)
- [Privacy and Refund Policy](https://www.part66online.com/policy/)