Summary
The FAA proposes to supersede Airworthiness Directive (AD) 2009-09-02, which applies to certain Bombardier, Inc., Model DHC-8-400 series airplanes. AD 2009-09-02 requires repetitive inspections for damage of certain main landing gear (MLG) forward stabilizer brace assemblies, repetitive inspections for cracking of both MLG forward stabilizer braces, liquid penetrant inspections for cracking, and corrective actions if necessary. Since the FAA issued AD 2009-09-02, the FAA has determined that the installation of an elbow restrictor is necessary to address the unsafe condition which would extend the repetitive inspection interval. This proposed AD would retain the existing actions and also require installation of an elbow restrictor. The FAA is proposing this AD to address the unsafe condition on these products.