US: FAA requires airlines to replace GEnx-2B fuel manifolds

The FAA is ordering airlines to replace fuel manifolds on some GE Aviation GEnx-2B67 engines, which power Boeing 747-8s, due to the risk of an engine fire. An airworthiness directive that takes effect Jan 4 comes in response to an engine fire caused by "low-cycle fatigue cracking of the fuel manifold". The order requires airlines to replace the manifolds during the next shop visit. The issue affected 424 GEnx-2B engines worldwide, but GE already issued a service bulletin and only 140 engines still require fixes, the company says. Those 424 engines compose the bulk of engines on the worldwide in-service fleet of 123 747-8s and 747-8Fs. US airlines operate only two affected engines, the directive says. <br/>