Sukhoi Su-57 the aircraft will be repaired, and that the fire "will not affect the timing of the T-50 test program". Sukhoi Su-57 The Sukhoi Su-57 () is the designation for a stealth, single-seat, twin-engine multirole fifth-generation jet fighter being developed for air superiority and attack operations. The aircraft is the product of the PAK FA (, ), a fifth-generation fighter programme of the Russian Air Force. Sukhoi's internal name for the aircraft is T-50. The Su-57 will be the first aircraft in Russian military service to use stealth technology. The fighter is designed to have supercruise, supermaneuverability, stealth, and advanced avionics
Sukhoi Su-27 by the Japan Ministry of Defense. Russia denied the incursion, saying the jets were making routine flights near the disputed Kuril Islands. In another encounter, on 23 April 2014 an Su-27 nearly collided with a United States Air Force Boeing RC-135U over the Sea of Okhotsk. Russia plans to replace the Su-27 and the Mikoyan MiG-29 eventually with the Sukhoi Su-57 stealth fifth-generation multi-role twin-engine fighter. A squadron of Su-27SM3s was deployed to Syria in November 2015 as part of the Russian military intervention in the Syrian Civil War. Ethiopian Su-27s reportedly shot down two Eritrean MiG-29s and damaged another