ChineseTiger1986
ELITE MEMBER
It seems to be confirmed that we gonna see the first squadron of J-20s around 2015. 
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, stated that there were problems with the quality control procedures on the WS-10A production line, meaning the Taihang turbofan was still of unsatisfactory quality. He said that solving these problems would be a key step.[7] The Chinese engines have been lasting 30 hours at a time vs 400 for the Russian originals.[8]