Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes
airworthiness · Rule · Final rule. · Published 2006-03-27 · Effective 2006-05-01 · 71 FR 15012
Document
Document number
06-2853
Federal Register citation
71 FR 15012
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135
Publication date
2006-03-27
Effective date
2006-05-01
FAA docket
Docket No. FAA-2005-20728
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain EMBRAER Model EMB-135 airplanes and Model EMB-145, -145ER, - 145MR, -145LR, -145XR, -145MP, and -145EP airplanes. This AD requires replacing the horizontal stabilizer control unit (HSCU) with a modified and reidentified or new, improved HSCU. For certain airplanes, this AD also requires related concurrent actions as necessary. This AD is prompted by reports of loss of the pitch trim system due to a simultaneous failure of both channels of the HSCU. We are issuing this AD to prevent loss of pitch trim and reduced controllability of the airplane.