Production of the Sukhoi Su-27UB/UBKoperational trainer has ended at the Irkutsk APO (IAPO)aircraft factory where it had been built since the mid-1980s. The last aircraft built were for China, with the final delivery due in November. IAPO is now manufacturing only the Su-30MKI twin-seat fighter for India. The other Sukhoi Su-27 factory, KnAAPO at Komsomolsk-na-Amur, did not build two-seaters until it began producing Su-30MKKs for China.
Source: Flight International