Originally Posted by
gums
The 'bus system doesn't work the way ours did and still does.
So I would recommend that once outta primary law that the system uses something like we had.
You're talking about comparing an airliner with a fighter - what works for one will not necessarily work for the other.
The reason Alternate Law exists in the first place is to provide a graceful degradation so that pilots aren't dropped from Normal into Direct, which would be too jarring. It also provides a partial set of "soft" protections in certain circumstances. This makes sense for an airliner - it's not bad design.
One of the crucial factors that Airbus FBW pilots must (and usually do) understand is that the protections cannot be relied upon outside of Normal Law. There were no protections as soon as Alt2 was latched - the pilots should have been aware of this.
You can have computers operating on single data sources in a fighter with a bang seat, because if everything goes to plaid the single human occupant can egress safely in mid-air. This doesn't work for airliners, so the only safe way to apply the technology is to check, cross-check and re-check.