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EASA Part-66 Module 10 Cats A · B1 · B2 · B2L · B3

Aviation Legislation EASA Part-66 — Module 10 Practice Questions

Module 10 of the EASA Part-66 syllabus covers the regulatory framework that governs aircraft maintenance in Europe — ICAO, EASA, Part-145, Part-M, Part-66 itself, occurrence reporting and the new cybersecurity section. Below: what's examinable, exam format, and seven sample questions in the style you'll meet on exam day.

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Every question comes with a worked, EASA-grounded explanation — understand why, don't just memorise.
500
Questions in bank
5
Syllabus sections
55 min
Exam time (B1/B2)
75 %
EASA pass mark

UK CAA examines Module 10 by essay (EASA made it multiple-choice only in 2024). See 20 worked model essay answers for this module, each with the examiner Key Points. Open Module 10 essays →

Syllabus at a glance

Full Module 10 syllabus
Section 10.1
Regulatory Framework
  • Role of ICAO, EASA & the European Commission
  • Regulation (EU) 2018/1139 & the Implementing Rules
  • Occurrence reporting under Regulation (EU) 376/2014
Section 10.2
Certifying Staff
  • Part-66 licence categories & subcategories (A, B1, B2, B2L, B3, C)
  • Basic knowledge, experience & continuation training
  • Certificate of Release to Service — who may issue, when
Section 10.3
Maintenance Organisations
  • Part-145 scope & approval requirements
  • Accountable Manager & personnel responsibilities
  • EASA Form 1 & maintenance records retention
Section 10.5
Air Operations
  • Regulation (EU) 965/2012 & Air Operator Certificates
  • ETOPS, CAT II/III & specialised operations
  • Documents carried on board & the Aircraft Technical Log
Section 10.7
Continuing Airworthiness
  • Part-M, Part-ML & Part-CAMO responsibilities
  • Aircraft Maintenance Programme (AMP) approval & amendments
  • Airworthiness Directives, Service Bulletins & major/minor classification

Three classic exam-day traps

AMC/GM are guidance, not law

The hard law sits in Regulations (EU) 1321/2014, 748/2012, 965/2012 etc. AMC and GM are acceptable means — you may use alternatives, provided you can demonstrate equivalent compliance.

B1 includes A — but only the matching subcategory

B1.1 (turbine aeroplanes) automatically carries A1 privileges, B1.2 carries A2, and so on. B1.1 does not grant A3 or any B2 privilege — a frequent distractor on the paper.

72 hours vs 30 days for occurrence reports

Regulation (EU) 376/2014 mandates submission within 72 hours of awareness. The 30-day figure refers to follow-up analysis by the competent authority, not the initial report.

What Module 10 covers — in plain English

Module 10 is the legislation module — the regulatory backbone every licensed aircraft maintenance engineer operates inside. It is one of the more memorisation-heavy modules in the EASA Part-66 syllabus, dealing less with how aircraft work and more with who is allowed to do what, under which approval, recorded for how long, and reported to whom. The syllabus was substantially rewritten by Commission Implementing Regulation (EU) 2023/989 (effective 12 June 2024), which added new sub-sections on independent certifying staff, oversight principles in continuing airworthiness, maintenance beyond current EU regulations, and — for the first time — cybersecurity in aviation maintenance under Part-IS.

You are expected to know how the regulatory hierarchy fits together. ICAO sets the global Standards and Recommended Practices through the 19 Annexes to the Chicago Convention; the European Commission turns the relevant ones into Regulation (EU) 2018/1139 (the EASA Basic Regulation); and EASA issues the implementing rules — including Regulation (EU) No 1321/2014, whose annexes you will reference daily (Part-M, Part-145, Part-66, Part-147, Part-ML, Part-CAMO, Part-CAO). Sitting alongside the hard law are the AMC, GM and CS issued by EASA: acceptable means of compliance and guidance, not binding rules. Most exam questions are direct recall of specific articles — pass marks, retention periods, CAT II/III decision heights, licence privileges, occurrence-reporting timelines — so a slow first pass through the regulation text pays off more here than in the engineering modules.

All five licence categories (A, B1, B2, B2L, B3) sit Module 10, but the question count differs: 44 questions in 55 minutes for B1, B2 and B2L; 32 questions in 40 minutes for A and B3. Knowledge levels are mostly 1 and 2 across the section, with one level-3 sub-section (10.4 Independent Certifying Staff) reserved for the B-categories — Cat A candidates skip 10.4 and 10.9 entirely. The newer cybersecurity sub-section (10.10) is level 1 for everyone and is best approached after the rest of the module sits comfortably, because it draws on terminology from Part-IS that does not appear elsewhere in the Part-66 syllabus. The full per-section knowledge-level breakdown is on our Module 10 syllabus page.

These samples are drawn from our live Module 10 question bank of 500 questions. The full timed practice quiz draws 44 questions per attempt (or 32 for Cat A), scored against the official EASA 75 % pass mark, with weak-area tracking across attempts.

7 free sample questions

Click "Reveal answer + explanation" after you've picked.

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Q1 Regulatory Framework · ICAO

The total number of ICAO Annexes is:

  1. A 12, covering the essential elements of international civil aviation operations
  2. B 19, covering subjects from personnel licensing to safety management systems
  3. C 25, covering all aspects of aviation from design to airport security measures
Reveal answer + explanation Hide answer
Correct answer: B — 19, covering subjects from personnel licensing to safety management systems
ICAO publishes 19 Annexes to the Chicago Convention, ranging from Annex 1 (Personnel Licensing) through Annex 6 (Operation of Aircraft) and Annex 8 (Airworthiness) to Annex 19 (Safety Management). They form the global SARPs framework adopted by all contracting states.
Q2 Regulatory Framework · Occurrence Reporting

Under Regulation (EU) No 376/2014, mandatory occurrence reports must be submitted:

  1. A Within 72 hours of becoming aware that an occurrence falls into a reportable category
  2. B Within 30 calendar days of the occurrence being formally investigated and documented
  3. C Within 24 hours of the occurrence happening regardless of its categorisation status
Reveal answer + explanation Hide answer
Correct answer: A — Within 72 hours of becoming aware that an occurrence falls into a reportable category
Regulation (EU) 376/2014 Article 4 sets the mandatory window at 72 hours of awareness, not 72 hours from the event itself. The clock starts when the organisation determines the occurrence is reportable, which is why classification training matters as much as the timeline.
Q3 Certifying Staff · Examinations

The pass mark for Part-66 multi-choice examination modules is:

  1. A 70 percent of the total marks available for that particular examination module
  2. B 75 percent of the total marks available for that particular examination module
  3. C 80 percent of the total marks available for that particular examination module
Reveal answer + explanation Hide answer
Correct answer: B — 75 percent of the total marks available for that particular examination module
Appendix II to Part-66 fixes the pass mark for both multi-choice and essay questions at 75%. There is no negative marking on the multi-choice paper, and the essay element (where applicable) is marked separately against published criteria.
Q4 Certifying Staff · Licence Privileges

A Category B1.1 licence automatically includes privileges of:

  1. A Category A1, allowing minor scheduled line maintenance on turbine aeroplanes as well
  2. B Category A3, allowing minor scheduled line maintenance on turbine helicopters as well
  3. C Category B2, allowing full avionic system maintenance on all types of aircraft
Reveal answer + explanation Hide answer
Correct answer: A — Category A1, allowing minor scheduled line maintenance on turbine aeroplanes as well
Each B1 subcategory inherits the matching A subcategory: B1.1 → A1 (turbine aeroplanes), B1.2 → A2 (piston aeroplanes), B1.3 → A3 (turbine helicopters), B1.4 → A4. B1 never inherits B2 privileges — avionic certification is a separate licence track.
Q5 Maintenance Organisations · CRS

A Certificate of Release to Service (CRS) certifies that:

  1. A The aircraft has been manufactured in conformity with the approved production data
  2. B The aircraft design complies with the applicable type certificate data sheet requirements
  3. C The maintenance was properly carried out in accordance with approved data and procedures
Reveal answer + explanation Hide answer
Correct answer: C — The maintenance was properly carried out in accordance with approved data and procedures
The CRS is the post-maintenance attestation — it confirms the work was done correctly, using approved data and procedures. Manufacturing conformity is covered by EASA Form 1 from a POA, and design conformity by the Type Certificate; do not confuse the three.
Q6 Air Operations · CAT II/III

CAT II approach has a decision height lower than 60m but not lower than:

  1. A 15 metres (50 feet) with RVR not less than 175 metres for the approach to be conducted
  2. B 30 metres (100 feet) with RVR not less than 300 metres for the approach to be conducted
  3. C 60 metres (200 feet) with RVR not less than 550 metres for the approach to be conducted
Reveal answer + explanation Hide answer
Correct answer: B — 30 metres (100 feet) with RVR not less than 300 metres for the approach to be conducted
CAT II is defined as a precision approach with a DH below 60 m (200 ft) but not lower than 30 m (100 ft) and RVR not less than 300 m. CAT IIIA goes below 30 m DH; the 60 m / 550 m figure is the CAT I minimum.
Q7 Continuing Airworthiness · Records

Technical log entries must be retained for at least:

  1. A 12 months after the date of the last entry made in the aircraft technical log system
  2. B 36 months after the date of the last entry made in the aircraft technical log system
  3. C 60 months after the date of the last entry made in the aircraft technical log system
Reveal answer + explanation Hide answer
Correct answer: B — 36 months after the date of the last entry made in the aircraft technical log system
Aircraft Technical Log entries are retained for a minimum of 36 months after the last entry, per the Part-M / Part-CAMO records requirements. Detailed maintenance records and CRS data carry their own (longer) retention windows under Part-145.A.55.
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Module 10 — frequently asked questions

How many questions are in the EASA Part-66 Module 10 exam?
The number depends on your licence category. Category B1, B2 and B2L candidates answer 44 multiple-choice questions, while Category A and B3 candidates answer 32. So the two counts are not the same — the B-category paper is longer because those licences cover more of the Module 10 syllabus (including sub-sections that Cat A skips).
What is the pass mark for EASA Part-66 Module 10?
The pass mark is 75%, as fixed by Appendix II to Part-66 for every module. Module 10 is examined by multiple-choice questions with no negative marking, so it always pays to attempt every question rather than leave it blank. Aim comfortably above 75% in practice, because the recall-heavy legislation content leaves little room for careless slips.
How long is the Module 10 exam?
You get 55 minutes for the 44-question B1/B2/B2L paper and 40 minutes for the 32-question A/B3 paper. That works out to roughly 75 seconds per question either way. Module 10 questions are direct recall — regulation references, retention periods, licence privileges, reporting timelines — so most candidates who have revised the regulation text finish with time to spare.
Which EASA licence categories require Module 10?
All five basic licence categories sit Module 10: A, B1, B2, B2L and B3. It is one of the modules common to every category because aviation legislation applies to all certifying staff. The depth differs, though — Cat A candidates skip the level-3 Independent Certifying Staff sub-section (10.4) and one other, which is why the A/B3 paper has fewer questions than the B1/B2/B2L paper.
What does Module 10 cover, and what do students find hardest?
Module 10 covers the regulatory framework of aircraft maintenance: the Regulatory Framework (ICAO, EASA, Regulation (EU) 2018/1139 and occurrence reporting under Regulation (EU) 376/2014), Certifying Staff (Part-66 licence privileges and the Certificate of Release to Service), Maintenance Organisations (Part-145, EASA Form 1), Air Operations (Regulation (EU) 965/2012, ETOPS, CAT II/III), and Continuing Airworthiness (Part-M, Part-CAMO, Airworthiness Directives). The hardest points are usually distinctions rather than facts: remembering that AMC and GM are acceptable means of compliance, not binding law; that B1 inherits only its matching A subcategory (B1.1 grants A1, never A3 or B2); and that occurrence reports are due within 72 hours of awareness, not the 30-day competent-authority follow-up window.
Does Module 10 include essay questions?
Not under EASA any more. When Commission Implementing Regulation (EU) 2023/989 took effect on 12 June 2024 it made Modules 9 and 10 multiple-choice only, so the EASA Module 10 exam no longer contains an essay element. The UK CAA still examines Module 10 by essay, however, so if you are sitting the UK paper you must prepare written answers. See our Module 10 essay questions guide for worked examples.

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2. Physics
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3. Electrical fundamentals
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4. Electronic fundamentals
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9. Human factors
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12. Helicopter aerodynamics, structures and systems
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13. Aircraft aerodynamics, structures and systems
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14. Propulsion
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15. Gas turbine engine
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16. Piston engine
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17. Propeller

Module 10 study resources

Module 10 detailed syllabus
Per Commission Regulation (EU) 2023/989
Module 10 study notes
Topic-by-topic explanations
Q&A forum
Ask about tricky Module 10 questions
EASA licence categories
A · B1 · B2 · B2L · B3 overview

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