Originally Posted by
physicus
System redundancy at Airbus at least means that: redundancy. Different systems. At Boeing, it's misinterpreted to mean "more of the same".
.... You might get a hint of why that matters right about when all three GCUs fail at the same time in a 787 because of a coding error.
The 787 has six Generators not three, but hey, you know what you are talking about !
I'm also noting that Boeing did another booboo with their integrated IRSs in the 787 that can no longer operate independently of GNSS. That's (really) bad news when you're being spoofed.
I am noting that you have NFI. 787 GPS NAV can be & is set to off in areas of known spoofing. It then operates independently of GNSS (IRS with radio updates), but whatever you reckon.
When I flew Airbii, I recall the 330 had a wonderful feature that disabled its flaps once retracted inflight, if a monthly inspection had been overlooked. Requiring a flapless landing. Was that because it was programmed for redundancy in different languages by different teams?
Back on topic, it will be interesting to see what caused this event.