We are extremely satisfied with the results of these tests. At this stage we have nothing to worry about -- quite the contrary in fact, he told a press briefing in France.
Boeing has carried out 15 test flights of the lightweight, fuel-saving passenger aircraft lasting a total of some 60 hours from its Seattle commercial aircraft base.
The 787 staged a long-delayed maiden flight in December.
Boeing said on Friday it had so far completed initial stall tests and other dynamic maneuvers and carried out an extensive check-out of the airplane's systems.
It said the plane had reached its initial airworthiness milestone, allowing the company to expand testing.
First delivery is due in the fourth quarter.