JDC carried out the first engine start of the second stage for the PAK FA November 21, 2016 RR Army PAK FA (T-50) © Sergey Bobylev/TASS MOSCOW, November 21. /TASS/. The first land launch advanced engine for the aircraft PAK FA (T-50) held on Monday the United engine Corporation (UEC, part of rostec), the press service of the Corporation. Comments comments