Summary
We propose to supersede Airworthiness Directive (AD) 2016-25- 18, for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. AD 2016-25-18 requires an inspection for discrepancies of the attachment points of the links between the engine rear mount assemblies, and corrective actions if necessary. Since we issued AD 2016-25-18, we have determined that replacement of certain nuts and bolts in the engine rear mount assemblies is necessary. This proposed AD would require an inspection of certain attachment points, corrective action if necessary, and replacement of certain bolts and nuts in the engine rear mount assemblies. This proposed AD also adds airplanes to the applicability. We are proposing this AD to address the unsafe condition on these products.