China’s aircraft manufacturer COMAC announced that ARJ21-700 AC104 performed a design optimization flight test the 21st of February 2017 in Xining, China.

ARJ21 aircraft carried out design optimization flight test of take-off/go-around flight director in Xining to fully demonstrate the performance of ARJ21 take-off/go-around flight director after design optimization.

Previously, COMAC reported that ARJ21-700 aircraft has completed first global C check at Taikoo (Shandong) Aircraft Engineering (STAECO) on the 8th of February 2017, marking the official end of the first C check of the first ARJ21-700 delivered to Chengdu Airlines.

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During Airshow China 2016, COMAC (Commercial Aircraft Corporation of China) and China Aerospace Leasing ( CASLC ) signed an agreement for 20 firm and 20 options of ARJ21-700 aircraft powered by GE's CF34-10A engines. The engine order for the 20 firm aircraft is valued at $155 million USD at list price.
 

COMAC explained that this C check of ARJ21-700 aircraft was the first enroute C check which followed the standards of CCAR-145 of Civil Aviation Administration of China (CAAC). This C check included not only routine C check maintenance items but also Service Bulletin (SB) retrofit work, which aims to continuously optimize and improve the aircraft and enhance the security, maintainability, economical efficiency and comfortability of the China-made new regional aircraft.

ARJ21 has two variants namely ARJ21-700 and ARJ21-900 with maximum seats capacity of 90 and 105 respectively. The aircraft is powered by two General Electric CF34-10A with maximum flight range (standard version) of 1,400 miles or 2,200 kilometers.