Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 200) Series Airplanes

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This amendment adopts a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 and 200) series airplanes. This action requires a one-time visual inspection to detect chafing or cracking of all electrical wiring conduits located in the center fuel tank, and inadequate clearance between the tube assemblies and adjacent structures; and corrective actions, if necessary. This action also requires a modification to reinforce the right wing crossflow shutoff valve conduit. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to detect and correct chafing or cracking of the electrical conduits in the center fuel tank and inadequate clearance between tube assemblies and adjacent structures, which could result in electrical arcing and consequent fire or explosion in the center fuel tank.