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EASA Part-66 Module 1 — Mathematics
Find the current format, timing, scoring, fees, eligibility, and testing options for Part-66 Module 1, with direct links to official sources.
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QuestionsCategory A: 16 multiple-choice questions; Categories B1, B2, B2L and B3: 32 multiple-choice questions; no essay questions (question count depends on the licence category being examined)
Testing timeCategory A: 20 minutes; Categories B1, B2, B2L and B3: 40 minutes (nominal average of 75 seconds per multi-choice question)
ScoringPass mark of 75% for each module and sub-module multi-choice part of the examination; no penalty marking
Exam feeSet by the testing provider — The governing source leaves this value to the approved testing or training provider.
Prep options
Study resources for Part-66 Module 1
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Exam overview
What to know before choosing your prep
- Who runs it
- EASA
- Category
- Aircraft Maintenance
- Current version
- Module 1 — Mathematics syllabus and basic examination standard in Appendices I and II to Annex III (Part-66) of Regulation (EU) No 1321/2014, as amended by Regulation (EU) 2023/989 (EASA Easy Access Rules revision September 2025)
- Where it applies
- International / multi-country
- Exam languages
- Set by the testing provider — No official page lists delivery languages for Module 1 examinations: the regulation and Easy Access Rules are published in the EU official languages, but delivery language depends on the individual Part-147 organisation or national competent authority conducting the examination. stored as an explicit availability state rather than guessed
- Testing provider
- Conducted either by a Part-147 approved training organisation or by the national competent authority (varies by examining organisation; no single delivery vendor)
- Score validity
- Basic knowledge examinations must have been passed within 10 years prior to the application for an aircraft maintenance licence or the addition of a category/subcategory (10-year validity per individual module examination)
Exam structure
Multiple-choice-only module examination (no essay); each question has three alternative answers with exactly one correct answer; content bounded by the Appendix I Module 1 syllabus — Arithmetic (1.1), Algebra (1.2) and Geometry (1.3) — examined at knowledge level 1 or 2 depending on licence category
Where rules vary
The Part-66 examination standard applies uniformly across the EU Member States; via the EEA Agreement and the Swiss bilateral, the same EASA rules also apply in Iceland, Liechtenstein, Norway and Switzerland. Actual exam administration is by EASA-approved Part-147 organisations and the national competent authorities in those states.
Eligibility
None published at module level beyond applying for an aircraft maintenance licence; completion of an approved basic training course can substitute for experience requirements (66.A.30) but is not required to sit module examinations
Retake policy
A failed module may not be retaken for at least 90 days (30 days after a tailored retraining course at a Part-147 organisation); maximum three consecutive attempts per module, with further sets of three allowed after a 1-year waiting period