The FAA has mandated a Boeing-recommended fix to install new elevator components on all 737 Next Generation aircraft that addresses a problem linked to at least two instances of inflight elevator vibrations. The airworthiness directive (AD 2013-06-05), based on a Boeing service bulletin issued in April 2012, gives operators 60 months to replace left and right elevator tab control mechanisms with pieces with modified attach lugs, or modifying the lug assemblies alone. Boeing says that ...
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