With the fake parts scandal for airplanes I wonder if this should be mandatory for parts that impact public safety for public transport like trains, buses, planes and so on.

Airplanes are vastly more complex though. Four engines, flying at extremely high altitudes at hundreds of km/h, fully airtight, powerful onboard generators, food prep areas, bathroom etc, extensive ethernet networking for the small IFE units and WiFi access points, list goes on...

Whereas a train doesn't have anything close to that, even the high speed ones with all the bells and whistles, so I think it would be a bit unreasonable to expect them to be held to the same standards as an airplane.

The only train I'd suggest an exception for would be a maglev though - OEM parts only there please, especially for traction and em equipment 😳

Dont get me wrong, I want a full right to repair enshrined in law and using a system like this just to prevent it is clearly wrong, but if it could be adapted to allow for critical parts to be made under license by third parties and helped prevent fake parts then may be a small amount of good can come from this shitty practice.

Some independent validation of the manufacturing materials, their grade and assembly quality could work well here, since I'm not too sure if blindly trusting the parts manufacturers would be a great idea as long as they have profits in mind