Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes

The FAA proposes to supersede Airworthiness Directive (AD) 2022-19-09, which applies to all Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2022-19-09 requires repetitive inspections of the left and right main landing gear (MLG) lower spindle pins to detect corrosion, and applicable repair or replacement. Since the FAA issued AD 2022-19-09, the tracking of flight cycles for inspections was changed from the usage of the MLG to the usage of MLG lower spindle assemblies and a replacement was developed, which would terminate the inspections. This proposed AD continues to require certain actions in AD 2022-19-09, would change the tracking of flight cycles for inspections from the usage of the MLG to the usage of MLG lower spindle assemblies, and would require replacement of affected MLG lower spindle assemblies, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). This proposed AD also would remove airplanes from the applicability. This proposed AD would also prohibit the installation of affected parts under certain conditions. The FAA is proposing this AD to address the unsafe condition on these products.