According Commission Regulation EU 340/2015, we know that validity of the OJTI endorsement is just for 3 years. The OJTI endorsement may be revalidated completing refresher training on practical instructional skills during its validity period. Which kind of refresher training you complete during OJTI period of validity? Sometimes it happens that we don't have atco to train within the period of validity, in this case it is correct that the OJTI endorsement expires?? Thanks for your cooperation
