Airworthiness Directives; Bombardier Model CL-600-1A11 and CL- 600-2A12 Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model CL-600-1A11 and CL-600-2A12 series airplanes, that requires replacement of the anti-noise filter on the standby and auxiliary power unit (APU) fuel pump assemblies with a new filter. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent electrical arcing between the internal wiring and casing of the anti- noise filter on the standby and APU fuel pump assemblies, and consequent increased risk of fuel tank explosion or fire.