Whilst I agree with Richard that it is impossible to forget your learning and be completeley objective about the qualifications required to do the job, when I look back to my days of aircraft servicing, in the forces, with only an ONC, I am inclined to believe that I would have been able to repair and service the kit that I am working on now. As I have said on this forum before, setting qualifications too high not only deters applications from the people you want to attract but also results in the wrong type of person getting into the job.