Airworthiness Directives; Empresa Brasileira de Aeronautica, S.A. (EMBRAER) Model EMB-135 and -145 Series Airplanes

This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-135 and -145 series airplanes. This action requires applying torque to certain tubing fittings of the fire extinguishing systems of various areas of the airplane, and applying torque paint to the fittings. This action is necessary to ensure that certain tubing fittings of the fire extinguishing systems are properly torqued. Improperly torqued tubing fittings of the fire extinguishing systems of the baggage compartment, auxiliary power units (APU), and engines, if not corrected, could become loose and cause the fire extinguisher to inadvertently discharge. Inadvertent discharge of a fire extinguisher could result in reduced fire protection or the inability to extinguish a fire in the baggage compartment, APU, or engine. This action is intended to address the identified unsafe condition.