What is the difference between basic experience, practical type training and On-the-Job Training (OJT)?

Although all three relate to practical maintenance activities, they serve different purposes.

Basic Experience

Basic experience is one of the requirements for the initial issue of an Aircraft Maintenance Licence (AML). The required duration depends on the licence category and on the applicant’s previous technical training or completion of a Part-147 approved basic training course.

Practical Type Training

Practical type training is the practical element of aircraft type training for a specific aircraft type. Its purpose is to develop practical maintenance skills on that type and to meet the standard of Appendix III to Part-66. Where practical type training is conducted by a Part-147 organisation, successful completion is evidenced by the applicable Certificate of Recognition.

On-the-Job Training (OJT)

On-the-Job Training (OJT) is training on a particular aircraft type in a real workplace. It is conducted at one or more maintenance organisations appropriately approved for maintenance of that aircraft type; one of those organisations controls the OJT. Under point 66.A.45(c), OJT is required for the endorsement of the first aircraft type rating within a given AML category or subcategory, except category C. Its purpose is to provide experience in maintenance best practices and correct release-to-service procedures; successful completion includes a final assessment.

Reference: points 66.A.30 and 66.A.45(c), and Appendix III, points 1 and 6 to Annex III (Part-66).