Boeing Co. has began engaging in flight trials of its 777-9 airplane with US regulators on board, attaining a milestone towards certifying its jumbo airliner after years of setbacks.The corporate introduced that it took the preliminary take a look at flight past due Friday with Federal Aviation Management body of workers. Attaining so-called Sort Inspection Authorization marks the beginning of certification flight checking out, a key step in one of the vital intensive industrial take a look at efforts that Boeing has ever undertaken.
