Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ, -135ER, -135KE, -135KL, -135LR, -145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes

摘要

The FAA is revising an earlier NPRM for an airworthiness directive (AD) that applies to certain EMBRAER Model EMB-135 and -145 series airplanes. The original NPRM would have required repetitive detailed inspections for surface bruising of the main landing gear (MLG) trailing arms and integrity of the MLG pivot axle sealant, and corrective actions if necessary; and would also have provided for optional terminating action for the repetitive inspections. The original NPRM was prompted by a report of a fractured axle of the trailing arm of the MLG due to corrosion of the axle. This action revises the original NPRM by expanding the applicability and by providing final terminating action for the repetitive detailed inspections. We are proposing this supplemental NPRM to prevent a broken trailing arm and consequent failure of the MLG, which could lead to loss of control and damage to the airplane during takeoff or landing.