Summary
We propose to adopt a new airworthiness directive (AD) for all Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This proposed AD was prompted by reports of dislodged engine fan cowl panels. This proposed AD would require installing additional attaching hardware on the left and right fan cowl access panels and the nacelle attaching structures. We are proposing this AD to prevent damage to the fuselage and flight control surfaces from dislodged engine fan cowl panels.