PTH, you could very well be right, like the recorder saw the baseball land in the park, then mysteriously transit over the fence.
What it failed to record, but everyone in the bleachers saw, was the dog that bit down on it, then jumped over the fence to freedom with his new chew toy.
What I'm talking about is a single data point, like airspeed. If the PFD shows 131 knots, that's what's on the FDR. If there was anything wrong with it, it would have been corrected after the first functional test procedure on the final assembly line, let alone get to production test flight.
Don't get me wrong, I know where you're coming from. There's been more than one "Foo Fighter" on the scope since radar was invented!
Stubs400