Basically, the work is carried out on MiG-29 aircraft and its modifications.

Belarusian specialists are restoring Russian combat aircraft in the Moscow region of the Russian Federation.
This was reported on the official website of the Main Intelligence Directorate of the Ministry of Defense of Ukraine.
“The Ministry of Defense of Belarus and the Government of the Russian Federation have signed fixed-term contracts for the repair and restoration of aviation equipment. In particular, employees of the 558th Aviation Repair Plant (Baranovichi) periodically make business trips as part of “field teams” to carry out work on the restoration and commissioning aviation equipment at the 121st aviation repair plant (the territory of the Kubinka airbase). Basically, work is carried out on MiG-29 aircraft and its modifications,” the report says.play video
Also, according to available information, specialists of the Armed Forces of Belarus are carrying out work on removing aircraft from storage and reactivation for further use in the war against Ukraine.
(C)UNIAN 2022

Yet another reason why Luka’s regime must be eradicated. The sooner, the better both for Belarus and Ukraine.
Funny the Moskali can’t even repair their own planes. Pathetic “Great Russians”…
They are following yet another of Nazi Germany’s many examples; their mechanics are now front line meat puppets.
Be nice to raid them just after they modified and fixed some. Or have their techs take up smoking. Either way tis a legitimate target.