In September 2016, images of an upgraded J-15, the "J-15A", emerged on the Internet, showing significant upgrades to its engines and flight performance. The plane makes use of domestically produced WS-10H turbofan engines, distinguished by a squarish, silver afterburner nozzle. While some J-15 prototypes were fitted with WS-10 turbofan engines, all production J-15s presently operating off the Liaoning aircraft carrier use the Russian AL-31 turbofan (which has a dark-colored afterburner nozzle). If future J-15As use the WS-10H as a power plant, it would indicate a triumph for China's emerging aviation engine industry, which has long been a weakness. Another likely upgrade is the installation of an Active Electronically Scanned Array (AESA) radar, which has improved resolution, multi-target ability, and resistance to jamming.