Airworthiness Directives; Bombardier Model DHC-8-102, -103, -106, -201, -202 -301, -311, and -315 Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-102, -103, -106, - 201, -202, -301, -311, and -315 airplanes, that currently requires a one-time inspection to detect chafing of electrical wires in the cable trough below the cabin floor; repair, if necessary; installation of additional tie-mounts and tie-wraps; and application of sealant to rivet heads. This amendment requires adding an additional modification of the electrical wires in certain sections. The actions specified by this AD are intended to prevent chafing of electrical wires, which could result in an uncommanded shutdown of an engine during flight. This action is intended to address the identified unsafe condition.