Boeing engineers and outsourcing
 

Boeing engineers give us a real vote of confidence with this aircraft.

Wasnt virtually the entire aircraft, not just the electrical system, outsourced?

Boeing 787’s problems blamed on outsourcing, lack of oversight | Business & Technology | The Seattle Times

This has been the case for years. Landing gear, engines, APU, flight control computers, actuators. Very little of a modern airframe is made entirely in house. Airbus have used multiple partner manufacturing processes for most of their models.