Airworthiness Directives; Bombardier Model DHC-8-100 and -300 Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-102 and -103 series airplanes, that currently requires a one-time inspection to detect disbonding of the upper and lower skin panels of the horizontal stabilizer, and repair, if necessary. This amendment establishes repetitive intervals for the inspection to detect disbonding of the upper and lower skin panels of the horizontal stabilizer. This amendment also revises the applicability of the existing AD to include certain additional airplanes, and to exclude certain other airplanes. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent reduced strength capability and consequent failure of the horizontal stabilizer, which could result in loss of controllability of the airplane.