The FAA has ordered Boeing 737 Next Generation operators to replace engine strut fluid draining systems with updated assemblies designed to eliminate a wear problem that caused some tubes to fail, creating a fire hazard. The airworthiness directive (AD 2012-23-08), issued today, gives operators until Dec. 31, 2017 to replace aft fairing drain tube assemblies and support clamps with improved parts designed by Boeing. The manufacturer recommends the repairs in a November 2011 service ...

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