Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model CL-600-2B19 series airplanes. This proposal would require, for certain airplanes, a one-time inspection to detect chafing or other damage of the integrated drive generator (IDG) cables and the firewall separators of the pylon, and corrective action if necessary. For other airplanes, this proposal would require identification of the part number of the clamps, and replacement with new clamps if necessary. This action is necessary to prevent electrical arcing between the IDG cables and the firewall separators due to chafing, which could result in an in-flight fire and/or loss of electrical power. This action is intended to address the identified unsafe condition.