Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB- 120, -120ER, -120FC, -120QC, and -120RT airplanes. This proposed AD would require a one-time inspection of the interior of the internal elevator torque tube of each elevator control surface for oxidation and corrosion, and corrective actions. This proposed AD results from corrosion in torque tubes of the elevators found during scheduled maintenance. We are proposing this AD to detect and correct corrosion in the torque tubes of the elevators, which could lead to an unbalanced elevator and result in reduced controllability of the airplane.