Chinese airframer Comac has completed the inertial reference system (IRS) certification flight tests for its ARJ21 regional jet programme.
Aircraft 104, one of four regional jets undergoing ground and flight tests, flew for 4h and successfully executed the tests. This was done at the AVIC flight test centre at Xian Yanliang airport.
"The preliminary test results demonstrated compliance to the requirements of the flight test plan. The inertial navigation positional accuracy and electromagnetic compatibility of the ARJ21-700 aircraft were also inspected," says Comac.
The IRS provides the aircraft's fly-by-wire system with location data, enabling precision approaches and highly accurate positioning during flight.
In January, Comac also completed stall tests on its regional jet.
At Airshow China in Zhuhai last November, Comac said it is targeting to receive certification from the Civil Aviation Administration of China in the first half of 2013, and to deliver the ARJ21 to launch customer Chengdu Airlines in 2014.
The delivery of the ARJ21 was initially scheduled for 2007, but the deadline has since been delayed several times because of problems in development and certification.