ANNEX IV

(Part-147)
Appendix I

Basic training course duration
The minimum duration of a complete basic training course shall be as follows:
This number of hours shall be increased as follows, depending on the additional system ratings selected: System Rating | Duration (in hours) | Theoretical Training Ratio (in %) COM/NAV | 90 | 50–60 INSTRUMENTS | 55 AUTOFLIGHT | 80 SURVEILLANCE | 40 AIRFRAME SYSTEMS | 100
Basic Course | Duration (in hours) | Theoretical Training Ratio (in %)
A1 | 800 | 30–35
A2 | 650 | 30–35
A3 | 800 | 30–35
A4 | 800 | 30–35
B1.1 | 2 400 | 50–60
B1.2 | 2 000 | 50–60
B1.3 | 2 400 | 50–60
B1.4 | 2 400 | 50–60
B2 | 2 400 | 50–60
B2L | 1 500 | 50–60
B3 | 1 000 | 50–60
Substituted by Commission Regulation (EU) 2018/1142 of 14 August 2018 amending Regulation (EU) No 1321/2014 as regards the introduction of certain categories of aircraft maintenance licences, the modification of the acceptance procedure of components from external suppliers and the modification of the maintenance training organisations' privileges (Text with EEA relevance).