ARJ21 AC108 returns to Shanghai after route adaptability flight in northeast China ARJ21 AC108 completed route adaptability flight in northeast China on December 17th, 2017. ARJ21-700 AC108 completed route adaptability flight and returned to Shanghai from Harbin on December 17th, 2017. The aircraft took off from Harbin Taiping International Airport at 9:28 a.m. and landed at Shanghai Dachang Airbase successfully at 12:06 after a flight of two hours and 38 minutes. It is reported that since flying to Harbin on November 25th, AC108 has taken Harbin Taiping Airport as the main base and conducted route adaptability flight among seven regional airports in Harbin, Heihe, Fuyuan, Jiamusi, Mohe, Wudalianchi and Changbai Mountains in 19 flight days. The aircraft has conducted more than 60 flights and accumulated about 61 flight hours. Among those areas, some have a minimum temperature of lower than -30℃. The adaptability of the aircraft and the manuals in extreme cold condition was fully verified, and simulation verification to the serviceability and the operation supporting capability was conducted. During the route adaptability flight, AC108 has flown to Mohe Airport, the northernmost airport in China and Fuyuan Airport, the easternmost airport in China for the first time. This route adaptability flight especially fostered the serviceability of the ARJ21-700 aircraft in cold conditions, created favorable conditions for subsequently putting ARJ21-700 aircraft into route operation in northeast China,and inspected the operation supporting system of Commercial Aircraft Corporation of China, Ltd. (COMAC) for ARJ21-700 aircraft in extreme cold conditions and at regional airports. It is of great significance for putting ARJ21-700 aircraft into operation in Heilongjiang as soon as possible, further expanding the market, and promoting the development of civil aviation industry in northeast China. Chengdu Airlines is scheduled to operate ARJ21-700 aircraft in the regional routes in Heilongjiang in 2018. ARJ21-700 AC108 landed at Changbaishan Airport on December 15th, 2017.