Summary
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The existing AD currently requires repetitive inspections for cracks, sealant damage, and corrosion of the main fittings of the main landing gear (MLG), and corrective actions if necessary. This proposed AD would reduce the compliance times for inspecting certain low-utilization airplanes, and provide a terminating action for the repetitive inspections. This proposed AD results from a report of a cracked main fitting of the MLG. We are proposing this AD to detect and correct fatigue cracking of the main fitting of the MLG and consequent failure of the main fitting, which could result in the collapse of the MLG.