sentences:  The company went through repeated changes in ownership during the 1980s and 1990s, leading to its acquisition by American helicopter operator Offshore Logistics in 1996, which re-branded itself as "The Bristow Group" in February 2006.Bristow Helicopters Limited holds a United Kingdom Civil Aviation Authority Type A Operating Licence, it is permitted to carry passengers, cargo and mail on aircraft with 20 seats or more.The U.S. division of Bristow is a Federal Aviation Administration (FAA) approved Part 135 air carrier.