The 207 added a seat in 1980 and was then known as the "Stationair 8". Production of the 207 was completed in 1984, just two years before U206 production halted. A total of 626 Cessna 207s were manufactured. The Cessna Model 207 has been popular with air taxi companies, particularly on short runs where its full seating capacity could be used. Very few of these aircraft have seen private use. Modifications In April 2007, Thielert announced that the European Aviation Safety Agency had granted a Supplemental Type Certificate (STC) for conversion of Cessna 206s to the Thielert V-8 diesel powerplant. The STC allows conversion of the following models: U206F and TU206F with the powerplant, and the U206G, TU206G, 206H and T206H with the version. This modification does not require any changes to the engine cowling. In May 2008, Thielert entered insolvency proceedings, so the future availability of this diesel conversion is uncertain. Soloy Aviation Solutions offers a turboprop conversion for some 206/207 models with the Rolls-Royce/Allison M250 engine/gearbox package. However, extensive engine cowl modifications are required. Atlantic Aero offers an FAA STC conversion to the Continental IO-550 powerplant. No cowl modifications are required. Both Kenmore Air (Edo floats) and Wipaire (Wipline floats) offer seaplane conversions. Variants 205 (Model 210-5) Original 205 model, six seats, powered by a Continental IO-470-S of , with a gross weight of landplane and certified on 14 June 1962 as a variant of the Cessna 210. 205A (Model 210-5A) Six seats, powered by a Continental IO-470-S of , with a gross weight of landplane and certified on 19 July 1963 as a variant of the Cessna 210. 206 Original 206 model, six seats, powered by a Continental IO-520-A of , with a gross weight of landplane, seaplane and certified on 19 July 1963. U206 Super Skywagon First U206 model, six seats, powered by a Continental IO-520-A of , with a gross weight of landplane, seaplane and certified on 8 October 1964. P206 First P206 model, six seats, powered by a Continental IO-520-A of , with a gross weight of landplane, seaplane and certified on 8 October 1964. U206A Six seats, powered by a Continental IO-520-A of , with a gross weight of landplane, seaplane, skiplane and certified on 24 September 1965. P206A Six seats, powered by a Continental IO-520-A of , with a gross weight of landplane, seaplane, skiplane and certified on 24 September 1965. P206B