Work Environment, Physical Demands, and Mental Demands: Work is performed in a shop environment, aircraft hangars, flight line, and shipboard that are moderately lighted, heated and ventilated to extreme weather conditions outside, is exposed to disagreeable fumes and to cuts and bruises from using tools in close placed and hazards of moving vehicles such as forklifts, sweepers, tow vehicles, and aircraft. Remove, clean, reinstall or replace defective parts, accessories, and components such as worn gaskets, couplings, and fittings; bad actuators, accumulators, gauges, sections of corroded fuel and oil lines, worn cable pulleys, frayed spark plug cables, and burned-out landing lights, using hand tools.