~~~~~~~~~~~~~~~~What Boeing builds and buys~~~~~~~~ They do not buy individual parts like bearings, the buy assembled components.
http://www.boeingsuppliers.com/buildBuy.html What Boeing buys As the world's leading aerospace company, The Boeing Company buys many products and services each year which fall into ten general categories. Aerospace support - maintenance and modification labor, repair and overhaul services, spares, training services, engineering services, ground support equipment and specialized part handling and distribution
Avionics and avionics components - communication systems, display systems, cockpit instruments, navigation and guidance systems, mission management systems, sensors, recording and storage systems, cables, and processors
Common aerospace commodities - from forgings, castings and wire bundles to mechanical and electrical adapters, fasteners, microcircuits, retainers, and sealants Electrical, hydraulic and mechanical systems - from electrical systems, environmental controls, fuel systems and controls, brakes and wheels and landing and nose gear components, to motors, switches, valves, tanks, meters and pumps
Interiors - including lavatories; interior lighting of all kinds; carpeting, mats and curtains; stowage bins; decorative laminates; oxygen equipment; and survival kits Major structures - such as fuselage and body sections, flight control surfaces, engine structure and nacelles, landing gear, cargo systems and other large integrated assemblies Non-production goods and services - such as factory tools and supplies; facilities services and supplies; computing hardware, software and services; office equipment and supplies; contract labor; and financial products and services Propulsion systems - such as aircraft engines, liquid and solid propellant rocket engines, missile and rotary-wing propulsion systems, jet fuel starter and pyrotechnics. Purchased outside production - including sheet metal and non-metallic products, machined parts, and tubing and ducting products and services
Technology - new technology, advancing the state-of-the-art of existing technologies, non-production prototypes, testing and evaluation, white papers, studies, analysis, research
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