BEIJING — A full-state new-configuration model of China's AG600 large amphibious aircraft conducted a successful maiden flight on May 31, according to the Aviation Industry Corporation of China (AVIC).

This new-configuration AG600 amphibious aircraft took off from the Zhuhai Jinwan Airport in South China's Guangdong province at 10:55 am, and then safely landed at the airport after a 20-minute flight, said the AVIC, the country's leading plane-maker.

During the maiden flight, it also conducted multiple flight test missions, including constant speed climbing, reducing speed in level flight and a simulated go-around.

AG600 aircraft remained in good condition throughout the flight, with the control system operating well and all systems working stably, said the developer.

The successful maiden flight of the full-state new-configuration model marked a new phase for the AG600 project and a major breakthrough in developing the firefighting functional model of the large amphibious aircraft, said the AVIC.

This new configuration AG600 aircraft is specially developed to serve firefighting missions, with a maximum take-off weight of 60 tons and maximum water-storage capacity of up to 12 tons. It fills China's blanks in the large firefighting aircraft, the AVIC added.

It is installed with a pressure cabin, fly-by-wire flight control system, integrated avionics system, and systems for its future firefighting missions.

Compared with the previous model of AG600, the new firefighting-configuration AG600 aircraft has higher performance, larger water-dropping capacity, longer range, and optimized platform for its future serialized development, said the developer.

The AG600, together with the Y-20 large transporter and the C919 single-aisle passenger airplane, is part of China's key project to independently develop a "large aircraft family."

Codenamed Kunlong, the AG600 is a key piece of aeronautical equipment in China's emergency-rescue system. It is developed by the AVIC to meet the needs of firefighting and marine rescue missions, as well as other critical emergency-rescue operations.

It is also the first Chinese homegrown large specialized aeroplane which is developed under the civil-aircraft airworthiness standards, said the AVIC.

The first AG600 successfully completed its maiden flight in 2017, its first take-off from a water reservoir in 2018, and its maiden flight over the sea in 2020.