The standard is pretty much set by 25.1309, not sure what the fuss is over by the politician's, maybe they need to learn to read n' rite while they stuff pork into their constituents, and the columnists may benefit from doing some research instead of parroting opinions from a website, and then squealing like the aforementioned piglet. That standard has it's basis in MIL STD-882 (now rev D) FWIW.
Just a casual read of airplane accident statistics would confirm that this standard is not met by many factors of ten across world wide fleets. This standard only applies to those issues not specifically covered in other parts of the regulations. In this case a Special Condition