国产精品99一区二区三_免费中文日韩_国产在线精品一区二区_日本成人手机在线

Norwegian helicopter crash caused by fatigue fracture: final report

Source: Xinhua| 2018-07-05 22:22:27|Editor: Yamei
Video PlayerClose

OSLO, July 5 (Xinhua) -- A fatigue fracture in one of the gears caused a fatal Airbus helicopter crash in western Norway in 2016 that killed all 13 people on board, Norway's Accident Investigation Board (AIBN) said in its final report on Thursday.

The main rotor suddenly detached from the Airbus EC 225 Super Puma helicopter without warning as it was en route from an oil platform in the North Sea to Bergen, Norway on April 29, 2016, the report said.

Shortly after, the helicopter crashed on a small island near Turoy, northwest of Bergen. Eleven Norwegians, one Briton and one Italian were killed.

"The accident was a result of a fatigue fracture in a second stage planet gear in the epicyclic module of the main rotor gearbox. Cracks initiated from a micro-pit at the surface and developed subsurface to a catastrophic failure without being detected," the report said.

The AIBN noted that there is no connection between the way the crew handled the aircraft and the accident. It has also excluded material nonconformity and mechanical failure, as well as maintenance actions by the helicopter operator.

The agency said there are significant lessons to be learned from this investigation related to "gearbox design, safety assessment, fatigue evaluation, condition monitoring, certification requirements and continued airworthiness of the AS 332 L2 and the EC 225 LP helicopters."

The AIBN issued 12 safety recommendations based on the investigation, it said.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011103261373042141
主站蜘蛛池模板: 济阳县| 长春市| 新安县| 五莲县| 乳山市| 邯郸县| 云安县| 喀什市| 泰顺县| 新巴尔虎左旗| 高唐县| 乡宁县| 松阳县| 东山县| 吴堡县| 乐安县| 浮梁县| 抚顺县| 铜山县| 彭阳县| 罗城| 华池县| 松潘县| 烟台市| 克什克腾旗| 禄丰县| 横山县| 双辽市| 丹寨县| 金华市| 金溪县| 明光市| 奉新县| 安平县| 湟中县| 信宜市| 普定县| 哈尔滨市| 吴江市| 牙克石市| 汕尾市|