US transport board calls for grounding some GEnx-powered planes
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US transport board calls for grounding some GEnx-powered planes

US transport board calls for grounding some GEnx-powered planes

The US National Transportation Safety Board (NTSB) has recommended grounding certain Boeing 787s and 747-8s powered by General Electric engines until they are inspected for cracks, Flightglobal.com has reported. The NTSB letter sent to the Federal Aviation Administration also reveals that an analysis of the fan mid-shaft fractures do not point to metal fatigue as a likely cause. Instead, the cracks in the critical engine component are "typical of environmentally assisted cracking of certain high strength alloys such as that used on the GEnx [fan mid-shaft]", the letter said.

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