No, not the Ukraine electing a certified clown as her President. But the delivery (in Russian) of a first couple of serial production PD-14 engines (first batch numbers 16 engines) to Irkut corp to be installed at the serial MC-21 commercial aircraft. This is huge and I cannot emphasize enough how huge it is. It is a state-of-the-art engine which is very competitive with Western analogues, getting pretty close in terms of bypass ratio, while being better in fuel economy. EASA is due to certify it this year, while in Russia it already received the certificate of type. This is a new era in modern Russian commercial aerospace and implications are gigantic.
No, Boeing-Airbus duopoly will not get crushed immediately but the fact that Russia already has a line of very competitive aircraft, from SSJ-100 to MC-21, to upcoming Il-96 with PD-35 for own market and that of former USSR should give some people a pause when framing global commercial aviation mostly in terms of this duopoly as a constant. But, as we all know, everything changes, all the time.