Summary
The FAA proposes to adopt a new airworthiness directive (AD) for all MHI RJ Aviation ULC Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by a report of missing insulation in the engine pylon area. This proposed AD would require, for certain airplanes, inspecting the engine pylon structure for discrepancies and repair if necessary. This proposed AD would also require revising the existing maintenance or inspection program, as applicable, to incorporate a new certification maintenance requirement (CMR) task. The FAA is proposing this AD to address the unsafe condition on these products.