Airworthiness Directives; EMBRAER Model EMB-145 Series Airplanes

This amendment supersedes an existing airworthiness directive (AD), applicable to certain EMBRAER Model EMB-145 series airplanes, that currently requires revisions to the Airplane Flight Manual (AFM) to provide the flight crew with updated procedures for prohibiting use of the autopilot below 1,500 feet above ground level, emergency procedures for pitch trim runaway, and abnormal procedures for autopilot trim failure and stabilizer out of trim. That AD also requires installation of certain warning placards. This amendment requires replacement of a certain integrated computer with a new integrated computer; installation of an upgraded integrated computers checklist; and removal of certain placards and certain limitations in the AFM. 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 failure of the pitch trim system, which could cause undetected autopilot trim runaway, and consequent reduced controllability of the airplane, uncommanded autopilot disconnect, and excessive altitude loss.