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

The FAA is superseding an existing airworthiness directive (AD), which applies to all EMBRAER Model EMB-135 airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes. That AD currently requires repetitive inspections of the pitot static heating relay K0057 and corrective actions if necessary. That AD also requires doing a terminating modification, which ends the repetitive inspections. This new AD removes the existing repetitive inspections and instead requires a one-time detailed inspection for damage of the relay, relay socket, and silicone gasket; applicable corrective actions; and a new action to modify and re-identify the relay socket. This AD also revises the existing terminating modification--replacing/ rerouting the windowsill drain hoses--into two parts, each with a different, reduced compliance time. This AD results from a report of smoke in the cockpit. We are issuing this AD to prevent ignition of a windowsill drain hose by an overheated relay, which could cause fire and smoke in the cockpit.