EASA Part-66 Module 9 and Safety Training including Human Factors – Initial

This course covers the Part-66 Module 9 human factors syllabus and the initial Part-145 safety training syllabus in one pass. Module 9 is basic knowledge for an aircraft maintenance licence under 66.A.25; safety training including human factors is a separate duty on the organisation under 145.A.30(e). The lessons follow Appendix I sub-modules 9.1 to 9.10. It is online, self-paced and in English, and ends with a completion certificate you can download.

Who must take this course (and why)

Two audiences, one syllabus. The first is a Part-66 licence candidate — category A, B1, B2, B2L or B3 — who needs Module 9 knowledge before the basic knowledge examination. Appendix I marks Module 9 as applicable to all those categories, so nobody escapes it.

The second is anyone inside a Part-145 organisation who needs initial safety training including human factors. AMC4 145.A.30(e)(a) puts that population very wide: nominated persons, line managers and supervisors; certifying staff, support staff and mechanics; planners, engineers and technical records staff; compliance monitoring and safety management staff; specialised services staff; stores and purchasing staff; and ground equipment operators.

The two groups overlap in real hangars — a B1 candidate working under supervision needs both — which is why this course exists as one product. What it does not do is merge the obligations. They remain two duties in two Annexes, and your training file should show both being met on their own terms.

What the regulation actually requires

On the licence side, 66.A.25(a) requires an applicant to demonstrate by examination a level of knowledge of the subject modules set out in Appendix I. Point 66.A.25(b) then restricts who may run that examination: a training organisation approved in accordance with Annex IV (Part-147), or the competent authority. Point 66.A.25(c) gives the result a 10-year shelf life relative to the licence application.

On the organisation side, 145.A.30(e) requires the organisation to establish and control the competency of personnel involved in maintenance, airworthiness reviews, safety management and compliance monitoring, including an understanding of safety management principles, human factors and human performance issues appropriate to the person’s function. AMC4 145.A.30(e) turns that into initial and further safety training against the GM1 145.A.30(e) syllabus, and 145.A.35(d) sets the 2-year period for certifying staff and support staff. Neither points at Module 9.

What the course covers

Lessons follow the Module 9 structure introduced by Regulation (EU) 2023/989, with sub-topic detail from AMC1 Appendix I:

• General prerequisite — 9.1: why human factors must be taken into account in maintenance, incidents attributable to human error, Murphy’s law
• Human performance and limitations — 9.2: vision, hearing, information processing, attention, memory, claustrophobia and physical access
• Social psychology — 9.3: accountability and responsibility, motivation, peer pressure, cultural issues, teamwork, management and leadership
• Factors that affect performance — 9.4: fitness and health, stress, time pressure, workload, sleep and fatigue, shift work, alcohol and drug abuse
• Physical environment — 9.5: noise and fumes, illumination, climate, motion and vibration, situational awareness
• Tasks — 9.6: physical work, repetitive tasks, visual inspection, complex systems, error-capturing methods, technical documentation
• Communication — 9.7: within and between teams, work logging and recording, shift handover, dissemination of information
• Human error — 9.8: error models and theories, types of error in maintenance, implications, organisational errors, error management
• Safety management, in two parts — 9.9: risk management, occurrence reporting, safety culture, just culture, hazard reporting, the organisational human-factors programme
• The Dirty Dozen and risk mitigation — 9.10: the twelve common failures, from lack of communication through complacency and fatigue to norms

Read against GM1 145.A.30(e), those lessons reach all eleven topics of the safety training syllabus, not just the obvious ones: 9.3 carries teamwork, 9.6 carries procedures and error-capturing methods, and 9.9 carries safety culture, professionalism and the organisation’s safety programme.

Initial vs continuation — which one do you need?

This is the initial course. Take it if you are preparing Module 9 for a licence, or if you hold no initial safety training including human factors certificate.

If you already hold that initial certificate and are due your next round under the organisation’s training programme, the Safety Training including Human Factors Continuation course is the right purchase — it is the second pass through the GM1 145.A.30(e) syllabus and costs less. Module 9 itself has no continuation cycle: it is a licence examination subject under 66.A.25, passed once, with the 10-year rule in 66.A.25(c) governing how long a pass stays usable for a licence application.

The trap worth naming is the reverse assumption. A Module 9 pass sitting in a personnel file does not answer an auditor asking how the organisation meets 145.A.35(d) in the current 2-year period. Those are different questions and need different evidence.

Exam, certificate and how organisations accept it

On completion you download a certificate issued by MOST.AERO, the training brand of AEROVISER OÜ in Estonia, naming the course and the date. It is a completion certificate. It is not a Part-66 basic knowledge examination result, and it grants no licence credit — only a Part-147 approved organisation or the competent authority may examine you under 66.A.25(b), and MOST.AERO is neither.

For reference, Appendix II to Part-66 sets the Module 9 examination at 28 multiple-choice questions in 35 minutes for categories A, B1, B3, B2 and B2L, with no essay questions and a 75 per cent pass mark. For the Part-145 side, acceptance rests with your organisation: AMC4 145.A.30(e)(d) allows safety training by the organisation itself, by independent trainers, or by any training organisation acceptable to the competent authority, with the procedures specified in the MOE under point (e). Completion is filed under 145.A.55(d).

Price, access and how to enrol

The course is €89 for one seat, paid once, with no subscription. It is online and self-paced in English: you start at enrolment and work through the lessons at whatever pace the shift pattern allows. The Welcome lesson is a free preview, so a licence candidate can check the depth against Appendix I before paying.

The enrol button opens the course on the MOST.AERO store, where you check out. MOST.AERO is a brand of AEROVISER OÜ, Estonia. For a group — an apprentice intake preparing Module 9, or a shift needing initial safety training — email info@most.aero with the headcount and we will arrange seats and one invoice. If a compliance monitoring manager wants the lesson mapping against both Appendix I Module 9 and GM1 145.A.30(e) for the training file, ask and we will send it.

Related guides

• How often is human factors training required in an EASA Part-145 organisation? — why a Module 9 pass does not answer the 2-year question in 145.A.35(d).
• Is online human factors, fuel tank safety and EWIS training accepted by EASA and the UK CAA? — what the AMC says about delivery method and provider.
• UK Part-145 SMS and safety training including human factors — the UK wording after SI 2023/588 and what the CAA expects documented.

If you only remember one distinction from this page, make it the first guide’s: licence knowledge and organisational training are audited separately.