> The trains were built to a environmental tolerance spec and shutting down when that spec is exceeded seems like a reasonable thing to do. Yes, they were buil

> The trains were built to a environmental tolerance spec and shutting down when that spec is exceeded seems like a reasonable thing to do. Yes, they were built to a spec. According to the official technical report[1] these trains DID NOT experience anything outside that spec. The shut down was not supposed to occur. The trains are simply defective and both manufacturer and operator testing failed to reveal these defects. There is no other reasonable conclusion. Defective, inadequately tested trains. > Having an expert test that all the safety systems are still working properly after they've been exposed to conditions they weren't designed for also seems prudent. This bit of guesswork is also contradicted in the official report as the manufacturer has committed to providing a system update to permit operation to resume WITHOUT any of your supposed 'prudence.' Resuming operation on power recovery without intervention by technicians is the specified, expected behavior. This is a separate defect that also survived whatever obviously inadequate testing regime was supposedly in effect. > Do you think people should pay higher ticket prices / more tax to fund trains that can tolerate a wider range of input frequencies, given how rarely these sorts of events happen? Since the official conclusion and subsequent response by the manufacturer both show the trains were specified to tolerate these conditions the extraordinary costs you imagine are a fiction; the cost has already been paid. No higher ticket prices required. And since these conditions were specified we also know they were indeed anticipated despite their infrequency. Both the manufacturer and the operator failed here. They got caught with their pants down. You may not like hearing that for whatever reason but that's the bottom line and inventing excuses won't change it. [1] https://news.ycombinator.com/item?id=20973513 https://news.ycombinator.com/item?id=20973513