Originally Posted by
krismiler
Many parts of an airliner these days aren’t specific to a single type or would need minor modifications, engines, APU, brakes, FMS, AVIONICS, cabin interiors, galleys, lavatories etc can easily be outsourced. The fuselage, wings and tail you need your own design for but I doubt anyone would be wanting to copy too much of the B737 design given its age and recent record.
The landing gears, for instance, are no longer designed by the airframe manufacturer. Safran designed most Airbus gears, as well as those of the 787.
So it maybe that the OEM has industrial secrets, not Boeing or Airbus.