The Sikorsky CH-148 Cyclone is a twin-engine, multi-role shipboard helicopter developed by the Sikorsky Aircraft Corporation for the Canadian Armed Forces. A military variant of the Sikorsky S-92, the CH-148 is designed for shipboard operations and replaced the venerable CH-124 Sea King, which was in operation from 1963 to 2018. The search for a Sea King replacement began in the 1980s. The Cyclone is operational with the Royal Canadian Air Force (RCAF) as of 2018 and is to conduct anti-submarine warfare (ASW), surveillance, and search and rescue missions from Royal Canadian Navy warships. The helicopter is also to provide tactical transport for operations supporting national and international security efforts. In 2004, Canada awarded Sikorsky Aircraft a contract for 28 CH-148s with deliveries planned to start in 2009. Deliveries were repeatedly delayed due to development issues and difficulty fulfilling contract requirements; the first deliveries, involving six initial helicopters in an interim configuration, occurred during June 2015. Three years later, the Cyclone attained its initial operating capability (IOC). The fleet was briefly grounded in early 2020 following a crash that was attributed to poor documentation and software flaws. Development Origins Canada began to seek a replacement for the Sea King maritime helicopter in 1986 when it issued a solicitation for the New Shipborne Aircraft (NSA) Project. A variant of the AgustaWestland EH101 was selected and a contract was signed by the nation's governing party at the time, the Progressive Conservatives. After a change of government to the Liberal party, the EH-101 contract was cancelled. The cancellation resulted in a lengthy delay to procure a replacement aircraft. The project took on increased importance in the early 2000s and another procurement competition was initiated. On 23 November 2004, Canada's Department of National Defence announced the award of a contract to Sikorsky to produce 28 helicopters, with deliveries scheduled to start in January 2009. In addition, Sikorsky's subcontractors, General Dynamics Canada and L-3 MAS are responsible for in-service maintenance and the Maritime Helicopter Training Centre including two Operational Mission Simulators. Other elements of in-service support include the Integrated Vehicle Health Monitoring System, spares and software support. The first flight of the first production CH-148, serial number 801 (FAA registration N4901C), took place in Florida on 15 November 2008. Delays and upgrades In May 2010, Sikorsky announced an engine upgrade for the CH-148 Cyclone by the end of 2012. General Electric was developing a new engine