JAA conversion
In order to fly UK registered aircraft you have to complete Human Performance and Aviation Law. This gives you a limited ATPL for UK registered aircraft only. I am currently studying for these two written exams. I have 21000 hours and ratings in A330/A320/B737/B727 several turbopprops and helos. I am a major U.S. airline A320 Captain retiring in October due age 60. In order to have an unlimited JAA ATPL (A) you have to complete remaining 12 written exams within 18 months of taking the first written.