To convert you have to meet the requirements off App 1 to JAR-FCL 1.300
(ii) have completed at least 500 hours of flight time as a pilot of aeroplanes of which at least 200 hours shall be as a flight instructor ;
(iii) have completed in accordance with JAR–FCL the approved relevant course(s) of theoretical instruction and flight training. The course may be modified, as approved by the Authority, taking into account the previous training and the experience of the applicant, but shall comprise at least 30 hours of ground instruction and 15 hours of dual flight instruction performed by a flight instructor holding a JAR–FCL licence and rating in accordance with JAR–FCL 1.330(f);
(iv) have passed the skill test set out in JAR–FCL 1.345;