Not so good vibrations 

The Federal Aviation Administration has issued an emergency Airworthiness Directive ordering airlines to immediately inspect the elevator tab control mechanisms, which stabilize the back of the plane, on all their Boeing 737s within the next 30 days. Nearly 600 aircraft are affected.

The AD was issued after a Ryanair 737 enroute to Spain from the Netherlands was forced to make an emergency landing in Brussels on March 2 due to “severe elevator vibration… [due to] failure of the aft attach lugs on the left elevator tab control mechanism.”

Airlines were ordered "to detect and correct" any loose tail bearings. "This condition, if not corrected, could result in a loss of aircraft control and structural integrity," the FAA warned.

Boeing is committed to the safe operation of its airplanes, and is working with FAA and its airline customers to assure compliance with this rule," the company said in a statement issued Wednesday. Other countries that have purchased 737s, including China, have also ordered similar inspections.

“There are major problems with 737s,” one former FAA inspector told The Examiner. “FAA is keeping their fingers crossed that this is the right approach.”

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