Airworthiness Directive · Amendment 39-13048 · Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes
Model EMB-135 and -145 series airplanes, having serial numbers as listed in EMBRAER Service Bulletin 145-27-0092, Change 02, dated August 26, 2002; and other Model EMB-135 and -145 series airplanes that have been equipped with a horizontal stabilizer control unit (HSCU) having part number (P/N) 362100-1007 MOD.1, P/N 362100-1009 MOD.0, or P/N 362100-5009 MOD.0; and having a serial number (S/N) above 4000, including S/Ns identified with an "A" suffix that were installed per emergency Brazilian airworthiness directive 2001-12-04, dated December 21, 2001; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-135 and -145 series airplanes. This action requires replacement of the horizontal stabilizer control units (HSCUs) with new upgraded HSCUs, and corrective actions if necessary. This action is necessary to prevent reversal of the pilot's pitch trim command for the horizontal stabilizer, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
