Originally Posted by
Speed of Sound
Although Boeing and Airbus would need every technical detail of those parts, including manufacturing and source material specifications, for certification purposes.
In my opinion, the certification agency would need that, not the airframe "client".
Boeing or Airbus provide the specs : geometry, resistance, etc.
The landing gear manufacturer do the design and certification job through his certified manufacturing facilities and expertise.
Think of installing a certified Garmin GPS appliance in a TC aircraft, for instance.
The product is certified, 'DO-160ed' etc