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66.A.55 requires that applicants and licence holders be able to produce evidence of their qualifications, including examination results, training certificates, and experience records, to the competent authority upon request.
What it means in practice
As a licence holder, you are responsible for retaining and being able to present documentary evidence of all the qualifications underpinning your licence. This includes basic knowledge examination results, approved training course certificates, type training and examination records, and documented maintenance experience. The competent authority can request this evidence at any time, whether during the initial application, when adding a type rating, or as part of an oversight inspection.
This requirement also applies to ongoing qualifications. If you have completed continuation training, attended refresher courses, or gained additional type experience, you should maintain records of these as well. Good personal record-keeping protects you in the event of a competent authority audit or if questions arise about the validity of your licence endorsements.
Key requirements
The evidence must be sufficient to demonstrate compliance with every applicable Part 66 requirement. This means examination certificates or transcripts must clearly identify which modules were passed and the dates of the examinations. Training certificates must reference the Part 147 approval and the course completed. Experience records must detail the nature, duration, and location of the maintenance work performed.
The competent authority retains discretion to request additional evidence or clarification if the submitted documentation is insufficient. For applicants converting from non-EASA licences or claiming credit for military experience, the evidence requirements are typically more extensive, as the competent authority must assess equivalency against EASA standards.
Common compliance gaps
The most common problem is simply not keeping copies of original documentation. Engineers who trained many years ago may have lost examination certificates, and Part 147 organisations may not retain records indefinitely. Reconstructing evidence of qualifications after the fact is difficult and time-consuming. Licence holders should keep personal copies of all qualification documents in a secure and accessible location throughout their career.
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