Air Service Training Ltd (AST) is a wholly owned subsidiary of UHI Perth, part of the University of the Highlands and Islands (UHI). AST remains a world leader in the field of Aviation training and has been since 1931, making it arguably the longest-established organisation of its kind and have trained in excess of 160,000 engineers and pilots from 150 countries across the world. AST is a provider of EASA Part 66 Approved/Modular Courses & Examinations. AST Holds the Approval for delivery of all Category 'A' and 'B' Licensing courses and examinations with the exception of the A4, B1.4 and B3 Licence.