Appendix IV — Experience requirements for extending a Part-66 aircraft maintenance licence
The table below shows the experience requirements for adding a new category or subcategory to an existing Part-66 licence.
The experience shall be practical maintenance experience in operating aircraft in the subcategory relevant to the application.
The experience requirement will be reduced by 50% if the applicant has completed an approved Part-147 course relevant to the subcategory.
| To From |
A1 | A2 | A3 | A4 | B1.1 | B1.2 | B1.3 | B1.4 | B2 | B2L | B3 |
| A1 | — | 6 months | 6 months | 6 months | 2 years | 6 months | 2 years | 1 year | 2 years | 1 year | 6 months |
| A2 | 6 months | — | 6 months | 6 months | 2 years | 6 months | 2 years | 1 year | 2 years | 1 year | 6 months |
| A3 | 6 months | 6 months | — | 6 months | 2 years | 1 year | 2 years | 6 months | 2 years | 1 year | 1 year |
| A4 | 6 months | 6 months | 6 months | — | 2 years | 1 year | 2 years | 6 months | 2 years | 1 year | 1 year |
| B1.1 | None | 6 months | 6 months | 6 months | — | 6 months | 6 months | 6 months | 1 year | 1 year | 6 months |
| B1.2 | 6 months | None | 6 months | 6 months | 2 years | — | 2 years | 6 months | 2 years | 1 year | None |
| B1.3 | 6 months | 6 months | None | 6 months | 6 months | 6 months | — | 6 months | 1 year | 1 year | 6 months |
| B1.4 | 6 months | 6 months | 6 months | None | 2 years | 6 months | 2 years | — | 2 years | 1 year | 6 months |
| B2 | 6 months | 6 months | 6 months | 6 months | 1 year | 1 year | 1 year | 1 year | — | — | 1 year |
| B2L | 6 months | 6 months | 6 months | 6 months | 1 year | 1 year | 1 year | 1 year | 1 year | — | 1 year |
| B3 | 6 months | None | 6 months | 6 months | 2 years | 6 months | 2 years | 1 year | 2 years | 1 year | — |