At 8:28 a.m. on January 7, C919 airliner took off under the condition of -35℃ at Hulunbuir Dongshan International Airport in Inner Mongolia. On January 8 and 14, the same scenario played out twice. After this crucial link, the 22-day arctic-alpine trial flight was rounded off.
This trial flight is a mandatory phase for C919 to acquire TC certificate. C919 should pass a series of experiments, which would put to test the functions, and performance of all its systems and facilities under extreme cold meteorological conditions. Takeoff during the daytime for three times when the temperature drops by -35℃ is one of the main experimental components.
In November, 2020, it was informed from the Beijing Climate Center (BCC) that there would be a strong cold air process in the whole country at the end of 2020. C919 outfield experiment team set about preparations. And C919 arrived at the designated airport eligible for the experiment on December 25.
On January 14, C919 rounded off the arctic-alpine experimental trial flight for 22 days. This is the group photo. Provided by Hulun Buir Municipal Meteorological Department Photo credits to Wang Ruojia
On the night of December 31, 2020, the meteorological support team went to the site and carried out services for 3 to 4 hours on end under the condition of -30℃. They have successfully installed 5 sets of portable meteorological stations prior to the New Year of 2021. Afterwards, personnel were on duty around the clock, and monitored the weather at the airport on a real-time basis.
In the meanwhile, China Meteorological Administration (CMA) dispatched experts from BCC to conduct on-site meteorological support, and organized experts from National Meteorological Centre (NMC), BCC, and Inner Mongolia Meteorological Observatory to have consultative meetings with on-site service personnel, and seize the window of opportunity of the cold air.
On January 6, the opportunity for the trial flight emerged. From January 7 to 9, around the mid-January and late-January, there would be one cold air process.
At 8:28 a.m on January 7, automatic meteorological stations at the Dongshan airport and the automatic stations at the civil aviation airport monitored the real-time temperature of -35℃. The opportunity has come for the takeoff.
Commercial Aircraft Corporation of China (COMAC) expressed that the artic-alpine experiment had high demands for the temperature, thus making meteorological observation exceedingly significant. It also pointed out that with the support of CMA, COMAC seized every opportunity of the low temperature and rounded off the experiment. (Jan. 20)
Editor: Liu Shuqiao