Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This proposal would require replacement of the horizontal stabilizer anti-icing valve with a new anti-icing valve. This proposal also would require reinforcement of the insulation over the anti-icing ducts of the horizontal stabilizer thermal anti-icing system. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent failure of the horizontal stabilizer anti-icing valve, which could cause the horizontal stabilizer thermal anti-icing system to be inoperative, and could result in reduced controllability of the airplane.