Michurinsk (also known as Michurinsk Northwest and Kozlov) is an air base in Russia, located 9 km northwest of Michurinsk in Tambov Oblast. It was built in 1952 and has been in use since then. The air base is owned by the Ministry of Defence and operated by the Russian Aerospace Forces, serving as a military training airfield. The 644th Training Aviation Regiment is stationed at the base, flying the Aero L-39C Albatros as part of the 786th Aviation Training Centre for the Training of Flight Personnel. In the early 1990s, the 644th Aviation Training Regiment was equipped with 108 Aero L-29 Delfin aircraft. More recently, the base has also been equipped with Su-24, Su-25, and MiG-29 aircraft. In 2008, the 644th Training Aviation Regiment was part of the 786th Training Centre, which was headquartered at Borisoglebsk.