Airworthiness Directives; Bombardier, Inc. (Type Certificate Previously Held by Canadair Limited) Airplanes

We propose to supersede Airworthiness Directive (AD) 2011-03- 08, for certain Bombardier, Inc., Model CL-215-1A10 (CL-215), CL-215- 6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) airplanes. AD 2011-03-08 currently requires an inspection to determine the number of flight cycles accumulated by certain accumulators installed on the airplane, and repetitive inspections of the accumulators for cracks and replacement if necessary. Since we issued AD 2011-03-08, we determined that a terminating action is necessary to address the identified unsafe condition. This proposed AD would add a requirement for the terminating action. We are proposing this AD to address the unsafe condition on these products.