Proposed rule · 2026-09381

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) 2022-25-05, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2022-25-05 requires repetitive cleaning and greasing of all slat tracks to prevent damage or corrosion; doing repetitive inspections of the slat tracks for any damage or corrosion, and the correct application of grease; and applicable corrective actions. Since the FAA issued AD 2022-25-05, it has been discovered that previous slat track repairs required the use of inappropriate non-destructive test (NDT) methods and, therefore, may have allowed cracks to remain undetected on slat tracks that were previously repaired. This proposed AD would continue to require the actions in AD 2022-25-05 and would require a rework NDT inspection on all slat tracks previously repaired using an inappropriate NDT method. The FAA is proposing this AD to address the unsafe condition on these products.