With GE Aviation RNP’s service, China Southern launched the first Required Navigation Performance flight including a route flown from Guangzhou-Linzhi-Guangzhou. GE Aviation designed procedures for China Southern Airlines’ fleet of Airbus A319s at Linzhi. The 95-mile approach into the airport is considered to be one of the most challenging commercial jetliner landings. Without RNP, Linzhi is only accessible 100 days a year, in daylight, due to adverse weather conditions. In 2008, GE assisted China Southern in implementing RNP solutions at Lhasa airport, validating the Airbus A319 and A330 aircraft.