Complex sentence: Abingdon was closed and a new facility was built at RAF St Athan, in South Wales- "1 Air Maintenance Sqn" (1 AMS); the first aircraft to undergo major servicing at the new facility entered in January 1993.
Split into simpler sentences: Abingdon was closed and a new facility was built at RAF St Athan, in South Wales- "1 Air Maintenance Sqn" (1 AMS). The first aircraft to undergo major servicing at the new facility entered in January 1993.