Technicians install rivets on fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China, Sept. 19, 2014. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Ding Ting) 

Technicians assemble fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China, Sept. 19, 2014. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Ding Ting) 

A technician assembles fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China, Sept. 19, 2014. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Pei Xin) 

Technicians assemble fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China, Sept. 19, 2014. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Pei Xin) 

Technicians install rivets on fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China, Sept. 19, 2014. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Pei Xin) 

Photo taken on Sept. 19, 2014 shows the fuselage of C919 airliner in the assembly base of the Commercial Aircraft Corp. of China (COMAC) in Shanghai, east China. China's first C919 airliner started structural assembly on Friday here. The first C919 airliner is expected to make a maiden flight by the end of 2015. (Xinhua/Pei Xin)