 Following its sister airline's adoption of a new corporate strategy at the beginning of the 1990s, which resulted in a simpler, less maintenance-intensive fleet mix, Dan-Air Engineering was put up for sale as its capacity exceeded the sister airline's maintenance requirements by 45%.FLS Aerospace acquired Dan-Air Engineering on 28 February 1991 for £27.5 million.Dan-Air's growing and varied fleet necessitated the development of a comprehensive 'in-house' maintenance capability from the very beginning itself.