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UK CAA Part-66 Module 10 Cats A, B1, B2, B2L, B3

Aviation Legislation UK CAA Part-66 — Module 10 Practice Questions

Module 10 of the UK Part-66 syllabus is aviation legislation as the UK applies it: ICAO, the CAA and the Secretary of State, Part-66, Part-145, air operations, Part 21 certification and aircraft documents, Part-M continuing airworthiness, and the national and international requirements. Below: the nine examinable parts, the UK paper, and seven sample questions.

Try 7 Module 10 questions — no account Try a 10-question warm-up
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Every question comes with a worked explanation grounded in UK law — understand why, don't just memorise.
536
Questions in bank
9
Syllabus sections
50 min
Exam time (B1/B2)
75 %
UK CAA pass mark

Syllabus at a glance

Full Module 10 syllabus

Practise one chapter at a time. Module 10 breaks into 9 syllabus chapters, and subscribers can drill any one of them on its own — ten questions from that chapter and nothing else. Useful when you have just studied a single topic and want to know whether it went in, rather than sitting a whole-module quiz. Open the module and choose By chapter.

Section 10.1
Regulatory Framework
  • Role of the International Civil Aviation Organisation
  • Role of the CAA and role of the Secretary of State
  • Regulations (EU) 2018/1139, 748/2012, 1321/2014 and 376/2014
  • Relation between the Annexes (Parts) of 748/2012, 1321/2014 and 965/2012
Section 10.2
Certifying Staff - Maintenance
  • Detailed understanding of Part-66 (level 2, every category)
  • Licence categories, subcategories and privileges
  • Basic examinations to the Appendix II standard
Section 10.3
Approved Maintenance Organisations
  • Detailed understanding of Part-145 (level 2, every category)
  • Part-M Subpart F
Section 10.4
Air operations
  • General understanding of Regulation (EU) No 965/2012
  • Air Operators Certificates; the operator's responsibilities, in particular for continuing airworthiness and maintenance
  • Aircraft Maintenance Programme and MEL/CDL
  • Documents to be carried on board and aircraft placarding (markings)
Section 10.5(a)
Certification of aircraft, parts and appliances: General
  • General understanding of Part 21
  • CAA certification specifications CS-23, 25, 27 and 29
  • CS-23 Normal-Category Aeroplanes, CS-25 Large Aeroplanes, CS-27 Small Rotorcraft, CS-29 Large Rotorcraft
  • Not examined for A
Section 10.5(b)
Certification of aircraft, parts and appliances: Documents
  • Certificate of Airworthiness; restricted certificates of airworthiness and permit to fly
  • Certificate of Registration and Noise Certificate
  • Weight Schedule; Radio Station Licence and Approval
  • Not examined for A
Section 10.6
Continuing airworthiness
  • Detailed understanding of Part 21 provisions related to continuing airworthiness
  • Detailed understanding of Part-M (level 2, every category)
Section 10.7(a)
Applicable National and International Requirements (a)
  • Maintenance programmes, maintenance checks and inspections (level 1 for A, 2 for B)
  • Airworthiness Directives; Service Bulletins and manufacturers service information
  • Modifications and repairs; maintenance manuals, structural repair manual, illustrated parts catalogue
  • MMEL, MEL and Dispatch Deviation Lists (only for A to B2 licences)
Section 10.7(b)
Applicable National and International Requirements (b)
  • Continuing airworthiness; minimum equipment requirements and test flights
  • ETOPS, maintenance and dispatch requirements (only for B1 and B2 licences)
  • All Weather Operations, Category 2/3 operations (only for B1 and B2 licences)
  • Not examined for A

Three classic exam-day traps

The UK text names the CAA

In 10.1, SI 2019/645 replaced the Role of EASA with the Role of the CAA and the role of the Member States and National Aviation Authorities with the Role of the Secretary of State. Under UK Regulation 2018/1139 the Secretary of State makes the detailed rules, by statutory instrument, and the CAA issues the certification specifications, AMC and guidance material.

Three parts Category A does not sit

The UK level table has a dash for Category A against 10.5(a), 10.5(b) and 10.7(b), so A is not examined on certification of aircraft, parts and appliances or on 10.7(b). In 10.7(a) Category A sits level 1, where B1, B2, B2L and B3 sit level 2.

Two different permits to fly

UK law has a Part-21 permit to fly, issued under Subpart P of Part 21, and a national permit to fly, which article 40 of the Air Navigation Order 2016 provides for non-Part-21 aircraft. The A, B and E Conditions in Schedule 3 to the Order, which let a non-Part-21 aircraft fly for set purposes such as testing, are national rules as well, not Part 21.

What Module 10 covers — in plain English

Module 10 is the legislation module of the UK Part-66 licence: the rules on who may certify which work, under which approval and on which document, and on which body makes and enforces those rules. The UK examines it to the Part-66 syllabus (Appendix I) and examination standard (Appendix II) of 31 December 2020, the end of the Brexit implementation period. In its Module 10 text, SI 2019/645 (regulation 278) wrote in the roles of the CAA and of the Secretary of State in 10.1, omitted the role of the European Commission, and wrote CAA certification specifications into 10.5(a).

The UK syllabus has nine examinable parts: 10.1 to 10.7, with 10.5 and 10.7 each split into (a) and (b). They run from the regulatory framework (ICAO, the CAA, the Secretary of State and Regulations 2018/1139, 748/2012, 1321/2014 and 376/2014), through Part-66, Part-145 and Part-M Subpart F and air operations under Regulation 965/2012, to Part 21 and the certification specifications CS-23, 25, 27 and 29, the aircraft documents, continuing airworthiness under Part 21 and Part-M, and the national and international requirements, from maintenance programmes and airworthiness directives to test flights, ETOPS and all-weather operations. Several of the aircraft documents in 10.5(b) come from the Air Navigation Order 2016 rather than Part 21: it provides the national certificate of airworthiness and the national permit to fly for non-Part-21 aircraft (articles 38 and 40), makes the CAA the authority for registering UK aircraft (article 25), and sets the nationality mark G and the four-letter registration mark (Schedule 4).

Five licence categories sit Module 10: A, B1, B2, B2L and B3. Category A is not examined on 10.5(a), 10.5(b) and 10.7(b), and sits 10.7(a) at level 1 where the B categories sit it at level 2. Within 10.7, the line on Master Minimum Equipment Lists, Minimum Equipment List and Dispatch Deviation Lists is marked "Only for A to B2 licences", and ETOPS and all-weather operations are marked "Only for B1 and B2 licences". The paper is 32 multiple-choice questions and one essay in 40 + 20 minutes for A and B3, and 40 multiple-choice questions and one essay in 50 + 20 minutes for B1, B2 and B2L, with a 75% pass mark for the multiple-choice part. The level of every part for every category is on our UK CAA Module 10 syllabus page.

These samples are drawn from our live Module 10 question bank of 536 questions. The full timed practice quiz draws 40 questions per attempt (or 32 for Cat A and B3), scored against the official UK CAA 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 - UK Regulation 2018/1139

UK Regulation 1321/2014 still refers in places to Regulation (EC) No 216/2008, which has been repealed. How are those references read?

  1. A as references to Regulation 748/2012
  2. B as references to Regulation 2018/1139
  3. C as references to Regulation 376/2014
Reveal answer + explanation Hide answer
Correct answer: B — as references to Regulation 2018/1139
Article 139(1) of UK Regulation (EU) 2018/1139 repealed Regulation (EC) No 216/2008 with effect from 11 September 2018, and Article 139(4) has references to the repealed Regulation construed as references to Regulation 2018/1139. Those references are therefore not read as references to Regulation 748/2012 or to Regulation 376/2014.
Q2 Certifying Staff - Recent experience

Before exercising the privileges of a UK Part-66 licence, how much maintenance experience in line with them must the holder have had in the preceding 2 years?

  1. A 12 months
  2. B 3 months
  3. C 6 months
Reveal answer + explanation Hide answer
Correct answer: C — 6 months
66.A.20(b)(2) bars the holder from exercising the privileges unless, in the preceding 2-year period, he or she has had 6 months of maintenance experience in accordance with them (or has met the provision for the issue of the appropriate privileges). 3 months is half of that figure and 12 months is twice it, so neither is the period the point sets.
Q3 Approved Maintenance Organisations - Independent inspection

A flight control cable was re-tensioned and then independently inspected. Under the CAA guidance, who issues the certificate of release to service or the sign-off for the job?

  1. A the person who made the independent check
  2. B the person who carried out the task
  3. C the operator's technical representative
Reveal answer + explanation Hide answer
Correct answer: B — the person who carried out the task
AMC4 145.A.48(c)(2) has the certificate of release to service, or the sign-off for the task, issued by the person who performed (or supervised) the task, once the independent inspection has been carried out satisfactorily. The independent qualified person issues no release and need not hold certification privileges, and an operator's representative is not the person the guidance names.
Q4 Air operations - Documents carried on board

On a commercial air transport flight, which of these documents may be carried as a certified true copy instead of the original?

  1. A the air operator certificate
  2. B the certificate of airworthiness
  3. C the certificate of registration
Reveal answer + explanation Hide answer
Correct answer: A — the air operator certificate
CAT.GEN.MPA.180(a) allows documents to be carried as originals or copies unless otherwise specified, and point (a)(5) specifies a certified true copy of the air operator certificate, with an English translation if it was issued in another language. The certificate of registration and the certificate of airworthiness are specified as originals in points (a)(2) and (a)(3).
Q5 Certification documents - Certificate of Airworthiness

The CAA has evidence that an aircraft no longer meets one of the conditions on which its airworthiness certificate stays valid. What does UK Part 21 require the CAA to do?

  1. A cancel the aircraft's UK registration
  2. B either suspend or revoke the CofA
  3. C replace it with a restricted CofA
Reveal answer + explanation Hide answer
Correct answer: B — either suspend or revoke the CofA
UK Part 21 point 21.B.65(a)(3) says the CAA must suspend or revoke a certificate of airworthiness or a noise certificate upon evidence that any of the conditions in 21.A.181(a) or 21.A.211(a) are not met. Registration is a separate matter under Air Navigation Order article 28(3), and a restricted certificate is issued on its own basis under 21.A.173(b); 21.B.65(a)(3) does not provide one in place of a suspended or revoked certificate.
Q6 Continuing airworthiness - Component installation

A serviceable component arrives with a valid CAA Form 1 and passes its incoming inspection. Under UK Part-M, what else must be true before it is installed?

  1. A the maintenance data specifies that item
  2. B a bench test confirms that it works
  3. C its owner has accepted it in writing
Reveal answer + explanation Hide answer
Correct answer: A — the maintenance data specifies that item
M.A.501(b) allows a component to be installed only when it is in satisfactory condition, belongs to one of the M.A.501(a) categories and the applicable maintenance data specifies that particular component, which the CAA's guidance checks against data such as the IPC. A bench test is not one of the conditions, and owner acceptance belongs to the ELA route of 21.A.307(b)(2).
Q7 National and International Requirements (a) - Airworthiness Directives

Under UK Part 21, what does an airworthiness directive issued or adopted by the CAA mandate for an aircraft?

  1. A actions to meet the latest safety standard
  2. B actions to extend its approved service life
  3. C actions to put its safety level right again
Reveal answer + explanation Hide answer
Correct answer: C — actions to put its safety level right again
Point 21.A.3B(a) defines an airworthiness directive as a document issued or adopted by the CAA which mandates actions to be performed on an aircraft to restore an acceptable level of safety, when evidence shows that its safety level may otherwise be compromised. The level restored is an acceptable one, not the latest standard, and ADs are issued to address unsafe conditions, not to extend a service life.
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Module 10 — frequently asked questions

How many questions are in the UK CAA Module 10 exam, and how long is it?
It depends on your licence category. Category A and B3 candidates answer 32 multiple-choice questions and one essay question, with 40 minutes for the multiple-choice part plus 20 minutes for the essay; Category B1, B2 and B2L candidates answer 40 multiple-choice questions and one essay question, with 50 minutes plus 20 minutes. Each multiple-choice question has three alternative answers, only one of them correct, and the time allowed for them is based on a nominal average of 75 seconds per question; each essay question is allowed 20 minutes.
What is the pass mark for UK CAA Module 10?
The pass mark for the multiple-choice part is 75%. The essay passes when the answer contains 75% of the required key points and no significant error related to any required key point. Penalty marking is not used to decide a pass, and if only one part is failed, only that part has to be retaken. A failed module may not be retaken for at least 90 days, or 30 days where a Part-147 organisation runs a course of retraining tailored to the failed subjects.
Which licence categories sit Module 10, and what does Category A not sit?
Five licence categories sit Module 10: A, B1, B2, B2L and B3. The UK level table excludes Category A from three parts, 10.5(a) (Part 21 and the certification specifications), 10.5(b) (aircraft documents) and 10.7(b) (continuing airworthiness, minimum equipment and test flights, ETOPS and all-weather operations), and examines A at level 1 in 10.7(a), where the B categories are examined at level 2. Two notes limit particular lines further: the MMEL, MEL and Dispatch Deviation Lists line in 10.7(a) is marked only for A to B2 licences, and the ETOPS and all-weather operations lines in 10.7(b) are marked only for B1 and B2 licences.
What do the nine parts of UK Module 10 cover?
10.1 Regulatory Framework: the roles of ICAO, the CAA and the Secretary of State, Regulations 2018/1139, 748/2012, 1321/2014 and 376/2014, and how the Annexes of 748/2012, 1321/2014 and 965/2012 relate. 10.2: Part-66. 10.3: Part-145 and Part-M Subpart F. 10.4 Air operations: Regulation 965/2012, Air Operators Certificates, the operator's continuing airworthiness and maintenance responsibilities, the maintenance programme, MEL/CDL, the documents carried on board and placarding. 10.5(a): Part 21 and the certification specifications CS-23, 25, 27 and 29. 10.5(b): the certificate of airworthiness, restricted certificates and permit to fly, the certificate of registration, the noise certificate, the weight schedule and the radio station licence. 10.6: continuing airworthiness under Part 21 and Part-M. 10.7(a) and 10.7(b): maintenance programmes, airworthiness directives, service bulletins, modifications and repairs, maintenance documentation and minimum equipment lists, then continuing airworthiness, test flights, ETOPS and all-weather operations.
How does the UK Module 10 paper differ from the current EU paper?
The UK paper includes an essay question and the EASA Module 10 paper does not. For B1, B2 and B2L the UK paper is 40 multiple-choice questions and one essay in 50 + 20 minutes, and for A and B3 it is 32 and one essay in 40 + 20 minutes; the EASA paper is 44 multiple-choice questions in 55 minutes for B1, B2, B2L and B3, and 32 in 40 minutes for A. The syllabus differs too: the UK has seven numbered parts, 10.1 to 10.7 (nine with the (a) and (b) splits), where the EASA syllabus has ten, 10.1 to 10.10, since Regulation (EU) 2023/989 replaced its Module 10 from 12 June 2024, a change the UK has not adopted.
Where do the questions for this UK module come from?
The questions are written to UK law, from the UK sources we keep on file for this module. Those carried over from our existing Module 10 bank were each checked against UK law.
Can I practise in a language other than English?

Yes. Every quiz question, all of its answer options and the written explanation can be read in 13 languages besides English — Chinese (Traditional), French, German, Greek, Hindi, Italian, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish and Turkish. It is included for every signed-in member at no extra cost, and you can switch language in the middle of a quiz without losing your answers or your timer.

The English original stays one click away on every question, which is the point: the UK CAA examination is sat in English, so you can read a question in your own language, answer it, then switch it back to English to check yourself against the wording you will actually meet.

Two caveats worth knowing. It is machine translation — checked so that no two answer options drift into meaning the same thing and that numerals and units survive intact, but it is not a human technical translation. And technical designations such as A320, LEAP-1A, Part-145, CS-25 and ATA chapter numbers are deliberately left in English, because those are the strings on the aircraft, in the manual and on the exam paper. Translation covers the quizzes; the study notes and reference pages are in English.

EASA Part-66 modules

All modules
EASA Part-66
1. Mathematics
EASA Part-66
2. Physics
EASA Part-66
3. Electrical fundamentals
EASA Part-66
4. Electronic fundamentals
EASA Part-66
5. Digital techniques / Electronic instrument systems
EASA Part-66
6. Materials & hardware
EASA Part-66
7. Maintenance practices
EASA Part-66
8. Basic aerodynamics
EASA Part-66
9. Human factors
EASA Part-66
10. Aviation legislation
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11. Aeroplane aerodynamics, structures and systems
EASA Part-66
12. Helicopter aerodynamics, structures and systems
EASA Part-66
13. Aircraft aerodynamics, structures and systems
EASA Part-66
14. Propulsion
EASA Part-66
15. Gas turbine engine
EASA Part-66
16. Piston engine
EASA Part-66
17. Propeller
EASA Part-66
18. Electric power plant

Module 10 study resources

Module 10 detailed syllabus
Regulation (EU) No 1321/2014 as it applies in the UK
Q&A Forum
Ask about tricky Module 10 questions
UK CAA Part-66 licences
A · B1 · B2 · B2L · B3 overview

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