41 EDUCATIONAL SERVICES, NAMELY, CONDUCTING CLASSES, SEMINARS AND WORKSHOPS IN THE FIELD OF MAINTENANCE, SERVICE, REPAIR, REFITTING, SUPPORT, REFURBISHMENT, RENOVATION AND USE OF AIRCRAFT AND PARTS AND FITTINGS THEREFOR AND TRAINING IN THE FIELD OF MAINTENANCE, SERVICING, REPAIR, REFITTING, SUPPORT, REFURBISHMENT, RENOVATION AND USE OF AIRCRAFT AND PARTS AND FITTINGS THEREFOR