22  | UNITED TECHNOLOGIES CORPORATION Business Highlights military and commercial helicopters; fixed-wing  aircraft; spare parts and maintenance, repair and  overhaul services for helicopters and fixed-wing  aircraft; civil helicopter operations. NET SALES $6.8 biLLiON OPERATiNG PROFiT $712 MiLLiON EMPLOyEES 16,591  UTC PROPULSIOn & AEROSPACE SySTEmS Turbofan engines for large commercial, business  and military aircraft; turboprop engines for regional  airline, business, utility and military aircraft;  turboshaft engines for commercial and military  helicopters; power units; maintenance, repair and  overhaul services, including the sale of spare parts  as well as fleet management services. NET SALES $14.0 biLLiON OPERATiNG PROFiT $1.6 biLLiON EMPLOyEES 35,847  NET SALES $8.3 biLLiON OPERATiNG PROFiT $944 MiLLiON EMPLOyEES 40,972  Aircraft systems for actuation, aerostructures, air management, interiors, landing gear, propellers,  and aircraft wheels and brakes; power controls  and sensing systems for electric systems, engine  components, engine and control systems, fire  protection, ISR systems, sensors and integrated  systems, and space systems.