But something stinks. I don't see how it gets around either FAR 25 airworthiness certification requirements, because it can be disabled. That's easy. When the

But something stinks. I don't see how it gets around either FAR 25 airworthiness certification requirements, because it can be disabled. That's easy. When the manufacturer rubberstamps his own ariworthyness certification this is not really a problem. Disable it, and now your airplane is not airworthy and your pilot possibly not suitably type rated? That's the exact crux of the issue. Boeing panically wanted to avoid recertification of the plane and the pilots in order to be competitive with Airbus' A320 NEO.