The world is being quietly rearranged by people who write very long documents.


The title they went with Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes Noisy translates that to

Cracks in old planes mean new parts for a specific model of turboprop


US aviation regulators are ordering mandatory repairs for certain De Havilland DHC-8-400 series airplanes. This means operators must replace specific parts in the elevator control system to prevent cracks and structural failure.
Aviation regulators issue these directives when a specific part or design shows a pattern of failure in service. This particular order means that a known structural weakness in a widely used regional aircraft model must now be fixed. It shifts the cost of a design flaw from potential accident victims to the aircraft operators and manufacturers.
Watch for similar directives on other aircraft models if these types of structural fatigue issues become more common across aging fleets.

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