Boeing said Monday there is no need to issue new guidance to operators of its 737 MAX 8 planes after two of the aircraft crashed in less than a year. Boeing says the investigation into the Ethiopian Airlines crash, which killed the 157 people onboard, is still in its early stages.“Safety is our number one priority and we are taking every measure to fully understand all aspects of this accident, working closely with the investigating team and all regulatory authorities involved,” a Boeing spokesman said. The Boeing 737 MAX 8 was introduced this past year, and is the newest model of the most widely used single-aisle jet in the world. China’s aviation regulator grounded all 100 Boeing Co 737 MAX 8 aircraft operated by its airlines on Monday. The crash of Ethiopian Airlines Flight 302 shortly after taking off from Addis Ababa occurred little more than four months after the crash of Lion Air Flight 610 in Indonesia. A total of 346 people died in the two crashes.