The Robinson R44 Raven II is a single-engined light utility helicopter for up to 1 crew and 3 passengers, powered by a carburetted Lycoming O-540-F1B5 piston engine. The Robinson R44 is built and developed by the Robinson Helicopter Company in Torrance, California. Design of the Model R44 began in 1985. The first prototype flew on 31 March 1990 and the second in January 1991. Sales efforts got under way in March 1992 at a base price of 235.000 US-Dollars. FAA Type Certification for the R44 Astro was achieved on 10 December 1992, and the first Robinson R44 Astro was delivered in February 1993. In 2000, the R44 Astro was replaced as the main production model by the hydraulically-assisted R44 Raven. The development from the first R44 Astro in 1993, via the R44 Raven I to the first R44 Raven II delivered in 2002, has been remarkable. For the pilot the most important difference is the conversion from a carbureted engine on the Astro to injection and hydraulic controls on the Raven II. Over 6500 of the four-seat Model R44s are delivered to customers all over the world.
The ICAO Aircraft Type Designator for the Robinon R44 Raven II helicopter is R44.

The 2014-built Robinson R44 Raven II c/n 13649 was registered D-HMIA in Germany on 3 April 2014 with Heli-Flight, Reichelsheim, and leased to Ambulanz Millich-Rettungsdienst, Kessin. The Robinson R44 Raven II D-HMIA replaced Robinson R44 Raven II D-HHRO in service as NEH with Ambulanz Millich-Rettungsdienst. The NotarztEinsatzHubschrauber (NEH) started its operations in 1995 and was known as NEH Bad Doberan. The helicopter is not a rescue helicopter, but is exclusive used for the fast infeed of the emergency physician and a paramedic to the scene of the accident where to the ambulance is going. The NEH is operated in order of the district of Rostock in Mecklenburg-Vorpommern. The medical staff is supplied by Universitätsklinik Rostock. On 2 May 2019, registration D-HMIA was cancelled as exported to Poland and re-registered SP-MOR.
On 3 May 2016, NEH (Notartzeinsatzhubschrauber) Robinson R44 Raven II D-HMIA of Ambulanz Millich-Rettungsdienst GmbH was seen at the helipad of the ambulance station of Ambulanz Millich in Kessin near Rostock, Germany, when in service as "Rettung 029-01-82-1".

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