COMAC ARJ21

ARJ21 Xiangfeng
ARJ21-700 in flight at the Zhuhai Air Show (2010).
Role	Regional jet
Manufacturer	Comac
Designer	AVIC I Commercial Aircraft Company (ACAC) and Antonov
First flight	28 November 2008
Introduction	28 June 2016 with Chengdu Airlines
Status	In production, in service (Deliveries began)
Primary user	Chengdu Airlines
Produced	2007–present
Number built	6
Unit cost	US $30 million as of 2015

The Comac ARJ21 Xiangfeng (Chinese: 翔凤; pinyin: xiángfèng; literally: "Flying Phoenix") is a twin-engined regional jet, manufactured by Chinese aerospace company Comac.

The development of the ARJ21 (Advanced Regional Jet) is a key project in the "10th Five-Year Plan" of China. It began in March 2002 and was led by the state-owned ACAC consortium. The maiden flight of the ARJ21 was initially planned to take place in 2005 with commercial service beginning 18 months afterwards. The programme was to become 8 years behind schedule. The design work was delayed and the final trial production stage did not begin until June 2006. The first prototype (serial number 101) rolled out on 21 December 2007, with plans for a maiden flight in March 2008. This was first delayed to 21 September 2008 and finally took place on 28 November 2008 at Shanghai's Dachang Airfield. The aircraft completed a long distance test flight on 15 July 2009, flying from Shanghai to Xi'an in 2 hours 19 minutes, over a distance of 1,300 km. The second ARJ21 (serial number 102) completed the same test flight route on 24 August 2009. The third aircraft (serial number 103) similarly completed its first test flight on 12 September 2009. The fourth aircraft (CN 104) flew by November 2010. By August 2011, static, flutter and crosswind flight tests had been completed. Deliveries to customers were expected to begin in late 2010, starting with Chengdu Airlines.

The ACAC consortium initially aimed to manufacture 11 ARJ21s a year by 2010, and 30 per year by 2015. In 2009 the consortium was reorganized and became a part of COMAC.

In November 2010, an ARJ21 wing failed to reach the predicted load rating during static testing. The wing's failure then led the Civil Aviation Administration of China (CAAC) to limit the aircraft’s flight envelope during its flight test program. The new delivery date was then set at the end of 2011.