| http://www.w3.org/ns/prov#value | - That could mean the plane would not return to the skies until late April or early May, he said.First, Boeing's redesigned batteries have to pass a series of 20 separate lab tests, Larsen said, then flight tests would follow.If there is any one test that is not passed, it is back to the drawing board for that particular part of the tests, he said.So far, test flights of two 787s have been approved ??
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