Japan’s All Nippon Airways on May 16 Thursday said that its one after the transformation of the battery system is currently undergoing test flight of the 787 Dreamliner again found a new problem.

As the Boeing 787 Dreamliner’s largest carrier All Nippon Airways said the accident caused damage to the power distribution board, but the company said the “small” and has nothing to do and the battery system.

After there were two consecutive battery system-related fire incidents, global regulators, led by the United States Federal Aviation Administration 1 issued the Boeing 787 flight ban. The Boeing 787 is designed to eliminate the risk of overheating the battery system rehabilitation programs approved by the Federal Aviation Administration in the last.

ANA Thursday’s report pointed out that Boeing employees about their aircraft during maintenance, the bolts connecting a wire and power distribution board is not properly tightened, is the cause of the accident reasons. The bolts vibrate during a test flight, led to friction and overheating, electrical panel partially charred.

ANA said the accident only on other types of aircraft found a small problem, “and said the company was not asked to safety regulatory agencies on such issues warning, but considering that around 787 security the widespread concern in 54 days, or be notified to the regulatory authorities. Reported that local overheating of the power distribution board led to the cockpit you receive an error warning signal, but normal flight, the plane landed safely.

ANA is currently under the name of 17 787 test flight to check the performance of the battery system after the upgrade. The company plans to start in 61 days to restore the commercial operation of the Boeing’s latest and most technically complex models.

787 aircraft is a Boeing passenger models use lithium-ion batteries, hopes to reduce the weight of such a wide-body aircraft, improved fuel economy. 20131, Japan Airlines moored in Boston airport a 787 fire incidents occurred due to battery overheating; Later in the day, the ANA a 787 because the battery overheat and catch fire and performed an emergency landing.

Airbus announced the cancellation of plans to use lithium-ion battery in the new A350 airliner 20132. A350 Airbus wide-body jet, the 787 Dreamliner is deemed to major competitors.