Boeing 787 correctly retracts nose landing gear when commanded to by maintenance workers
"Proper maintenance procedures directed technicians to install the landing gear downlock pins before operating the lever. Investigators found the nose gear pin and its red warning flag inside a storage box in the avionics compartment. Four downlock pins had been installed correctly on the main landing gear."
A good debate question. If a defective tire fails on a new car, I wouldn't blame the car manufacturer if the tire specs were appropriate for the car. In the past I had a Chrysler vehicle built with a Mitsubishi engine. These engines had a problem with leaking valve seals., and I have a harder time thinking who to blame for that one. What about defective supplier parts? A batch of Onan RV generators were built with valve springs that fractured after tens of hours of use. Onan might have life tested the springs before using them, then got a bad batch after years into production, and the failure didn't happen until about 50 to 100 hours of run time. Hard for me to blame Onan even though it's their product that failed. How the heck could they have prevented that?
There have been uncontained engine failures on Airbus planes. If there's no hull loss or injury they don't get much or any publicity, except maybe for the A380 that was at risk of being lost because of multiple systems failures caused by the engine debris. Airbus fault? Rolls Royce fault? Quantas fault? The root cause was a manufacturing defect in an engine part. I couldn't blame that on the aircraft manufacturer.