After completing type training, you must undergo Structured On-the-Job Training (SOJT or OJT), usually for B1/B2 license holders. This is performed under supervision in a real maintenance environment (e.g., an airline or MRO) and includes performing a range of tasks listed in the OJT logbook specific to the aircraft type. The tasks must be certified by a licensed supervisor. Once your OJT is reviewed and approved by the competent authority, the type rating is officially endorsed on your license. Only after this are you legally allowed to issue Certificates of Release to Service (CRS) for that aircraft type. This completes your qualification as a fully licensed EASA engineer with type approval, enabling you to work across EASA-regulated aviation environments.