According to defence News, the Russian company United Aircraft corp has declared that fresh installations have already been opened to accelerate the production of components of the jet fuel system, and the construction of a fresh avionics investigating hangar has besides begun. [Ukrainian ‘Defense Express’](https://defence-ua.com/weapon_and_tech/rf_rozkrila_vuzki_mistsja_virobnitstva_su_57_pid_raketi_h_69_kimi_bili_po_nashij_
energetitsi-16439.html) adds that another actions are besides planned to increase the production capacity of Russian fighters.