Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100) series airplanes. That AD currently requires revisions to the Airplane Flight Manual (AFM) to advise the flight crew of the need to perform daily checks to verify proper operation of the elevator control system, and to restrict altitude and airspeed operations under certain conditions. That AD also requires removal of all elevator flutter dampers. That AD was prompted by reports that the installation of certain shear pins may jam or restrict movement of the elevator. The actions specified by that AD are intended to prevent such jamming or restricting movement of the elevator and the resultant adverse effect on the controllability of the airplane. This new proposed action would add inspections of certain airplanes to detect deformation or discrepancies of the flutter damper hinge fittings and lug of the horizontal stabilizer, the elevator hinge/damper fitting, and the shear pin lugs; and require replacement of discrepant parts with serviceable parts. This proposed action also would require installation of new elevator flutter dampers, and replacement of shear pins and shear links with new, improved pins and links.