For more:
https://news.cgtn.com/news/2022-10-06/China-completes-natural-icing-flight-tests-of-C919-passenger-plane-1dUGdtMtq3C/index.html

China's first self-developed large passenger plane, the C919, has completed its natural icing flight tests within the Chinese territory after years of testing and improvement.

The C919 underwent five years of testing, including flying under natural icing conditions and through clouds in icing weather.

"We have handled 1,530 flights of the C919 safely and flown for nearly 4,000 hours. I believe it has no safety problem," said Ding Junliang, deputy chief engineer of the C919 flight test at the Chinese Flight Test Establishment, the lead unit for testing how large domestic passenger aircraft perform in natural icing situations.


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