Remember, they noticed that the left RA reading was bogus, but they didn't think it mattered.
because they thought they had bypassed the failed RA by switching FCCs.
This may be the third B accident where a single failed sensor resulted in an evil system response.
With A, there's two cases of multiple failed sensors resulting in accidents: AF447 and a test flight that fell into the Med when the good AoA sensor was outvoted by two bad ones.