The last OOB spreadsheet didn’t have much on the Eastern MD’s air forces (i.e. the 11th AVVSiPVO).
The 303rd Composite Aviation Division’s subordinate regiments are now included.
One is the 18th Guards Assault Aviation Red Banner Regiment based at Chernigovka.
Chernigovka last October
Some number (probably not two complete squadrons) of Su-25SM ground attack aircraft are parked along the flight line and on hardstands.
In 2015, Bmpd reposted an item from Alexeyvvo indicating this regiment was second (after Budennovsk — Southern MD) to receive the modernized Su-25SM.
Mil.ru confirmed the presence of an assault aviation regiment at Chernigovka in late 2019.
The helicopters on hardstands belong (ostensibly at least) to the 319th Independent Helicopter Regiment. Russian sources say the regiment has roughly 20 Ka-52 and 20 Mi-8AMTSh — either two large squadrons or maybe four smaller squadrons — two of each type (??).
The regiment has the same v/ch as the old 575th Aviation Base which can be considered replaced. The aviation bases were an innovation from Anatoliy Serdyukov’s tenure intended to save money by operating several aircraft types from the same airfield. It wasn’t popular with the aviators.
But a legacy from this is two different aviation units sharing the base at Chernigovka.
Muddying the waters is Mil.ru from early 2019 indicating there’s an army aviation formation [soyedineniye] at Chernigovka. Or a resurrected (and as yet unidentified) army aviation brigade.
For now let’s call it the 319th Regiment though now it’s probably a u/i brigade. Four smaller helo squadrons would make more sense as a brigade than a regiment.
Supporting the notion that the old 575th has reverted to an army aviation brigade, the old 573rd Aviation Base at Khabarovsk-Tsentralnyy airport is now the 18th Army Aviation Brigade with Ka-52, Mi-8AMTSh, and Mi-26 helos.
Similarly, in 2018, the VKS transformed the Central MD’s aviation bases into an army aviation brigade and an independent helo regiment.
These are largely organizational changes; the equipment has remained pretty much the same. But that’s some of the process of following the OOB. And here is the latest OOB, never finished, always a work in progress.