BBA Aviation Plc manufactures aircraft parts and provides flight support services. The company operates its business through two divisions: Flight Support and Aftermarket Services. The Flight Support division comprises Signature Flight Support and ASIG. This division provides re-fuelling, ground handling and other services to the business, general and commercial aviation markets. The Aftermarket Services division comprises Engine Repair and Overhaul, Legacy. This division maintains, manufacture and support engines and aerospace components, sub-systems and systems. The company was founded by William Fenton and Walter Wilson Cobbett in 1879 and is headquartered in London, the United Kingdom.