SAR-66 vs EASA Part-66: Is Your Study Material Valid in Singapore?
If you are preparing for an aircraft maintenance licence in Singapore, you may wonder whether EASA Part-66 practice questions and textbooks apply to you. For the basic-knowledge exams, the answer is largely yes. Here is the plain-English explanation, with official sources at the foot of the page.
The bottom line
Singapore's CAAS publishes its licensing rules as “Singapore Airworthiness Requirements Part 66” — the regulation is literally named Part 66. The basic-knowledge exams are module-based, drawn from the subjects in SAR-66 Appendix 1 (the same Appendix-based structure as EASA Part-66 Appendix I), are sat closed book, and use a 75% pass mark. So practising EASA Part-66 questions is valid preparation for the SAR-66 basic-knowledge exams. What is not shared is the licence itself — an EASA and a Singapore licence are separate and not mutually recognised.
At a glance
Aligned with EASA
- Regulation literally named “Singapore Airworthiness Requirements Part 66”
- Module exams drawn from the subjects in SAR-66 Appendix 1
- 75% pass mark, closed-book multiple-choice
- Formal foreign-licence conversion route (AC-66-10)
Singapore-specific
- Separate authority (CAAS) and a separate licence
- EASA and Singapore licences are not mutually recognised
- The air-law module is Singapore air law — study locally
- Conversion needs a CTC paper or the Appendix-1 module MCQs
Does Singapore use Part 66?
Yes — in name as well as in structure. CAAS publishes “Singapore Airworthiness Requirements Part 66 — Aircraft Maintenance Licensing” (commonly “SAR-66”), currently Issue 2. The document title carries the words “Part 66” directly, and it prescribes Singapore's aircraft maintenance licensing system: the licence categories, the basic-knowledge requirement, and the experience requirement.
SAR-66 sets out the exam subjects in its Appendix 1, the same Appendix-based module layout that EASA Part-66 uses in its Appendix I. That is what makes EASA Part-66 study material relevant to the Singapore basic-knowledge exams: the knowledge areas being tested are organised the same way.
Are the modules and exams the same?
For the basic-knowledge theory, they are closely aligned — which is why EASA study material works for the SAR-66 exams. Here is the side-by-side:
| What | EASA Part-66 | Singapore SAR-66 | Aligned? |
|---|---|---|---|
| Basic-knowledge structure | Modules per Appendix I | Module subjects per Appendix 1 | |
| Exam pass mark † | 75% | 75% | |
| Exam conditions | Closed book, multiple-choice | Closed book, multiple-choice | |
| Licence categories | A, B1, B2, B2L, B3, C, L | A, B1, B2, C | |
| Air-law module | EU/EASA air law | Singapore air law — study locally | |
| Foreign-licence conversion | — | Yes — AC-66-10 route | |
| Licence recognition | — | Not mutual — convert via AC-66-10 |
† The 75% pass mark is the figure widely reported per CAAS exam circulars for the SAR-66 basic-knowledge exams; confirm the current exam parameters directly with CAAS before relying on them. The exam subjects themselves are defined in SAR-66 Appendix 1, and the basic-knowledge exams are conducted without the use of training notes (closed book).
The Singapore licence structure
SAR-66 defines four aircraft maintenance licence categories. The B1 subcategory split follows the same Aeroplane/Helicopter × Turbine/Piston grid as EASA Part-66:
Category A & B1 subcategories
- A / B1.1 — turbine aeroplane
- A / B1.2 — piston aeroplane
- A / B1.3 — turbine helicopter
- A / B1.4 — piston helicopter
Category B2 & C
- B2 — avionics, including electrical, instrument and radio systems, all aircraft
- C — base maintenance certifying engineer (large aircraft)
Converting an EASA licence to a Singapore AML
There is no automatic swap between EASA and Singapore licences — they are not mutually recognised. CAAS does, however, publish a formal conversion route in Advisory Circular AC-66-10 “Conversion of Foreign Aircraft Maintenance Licence”, and there is an “Application for Conversion of Foreign AML to SAR-66 AML”. In outline:
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1. Apply under AC-66-10
An EASA Part-66 holder applies to convert their foreign AML to a SAR-66 AML using the conversion application.
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2. CTC conversion paper
The process involves a CTC (conversion) paper, which the applicant may attempt up to three times.
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3. Fallback: module MCQs
If the CTC paper is not passed within those attempts, the applicant must pass the multiple-choice exams of all the relevant modules in SAR-66 Appendix 1.
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4. Issue of the SAR-66 AML
On meeting the requirements, CAAS issues the Singapore AML for the relevant categories.
Conversion rules and forms change — always check the official CAAS AC-66-10 document (linked below) for your exact situation before you start.
What this means if you're studying in Singapore
For the SAR-66 basic-knowledge exams, EASA Part-66 practice questions are valid preparation — Singapore's regulation is itself named Part 66, its exam subjects sit in an Appendix-based module structure, and the closed-book exams use a 75% pass mark. Our question bank covers the full Part-66 module set, ready for SAR-66 candidates and EASA candidates alike. Just remember that the air-law module is Singapore-specific and should be studied from local material.
Sources
Primary statements on this page come from CAAS (the Civil Aviation Authority of Singapore) and its published documents. Exam-format details (marked † above) come from CAAS exam circulars and are labelled as secondary. Verify each point directly:
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CAAS — Aircraft Maintenance Engineer / Licence Application · the official AME licensing hub (application, categories).
caas.gov.sg/…/aircraft-maintenance-engineer/licence-application -
CAAS — SAR-66 (Singapore Airworthiness Requirements Part 66) · the regulation itself: “Part 66” naming, Issue 2, Appendix 1 module subjects.
caas.gov.sg/docs/default-source/pdf/sar66info.pdf -
CAAS — AC-66-10 Conversion of Foreign Aircraft Maintenance Licence · the foreign-AML conversion route (CTC paper, max 3 attempts, Appendix-1 MCQ fallback).
caas.gov.sg/…/ac-66-10(4)-conversion-of-foreign-aircraft-maintenance-licence.pdf -
CAAS — Aircraft Maintenance Licensing & Examination (e-services) · exam application and forms.
caas.gov.sg/e-services-forms/forms/aircraft-maintenance-licensing-examination
Information last verified against the sources above: June 2026.
This page is general information to help you prepare, not legal advice. Regulations can change — always confirm your own licensing situation on the official CAAS website before making decisions.