4 ms·
TFA said it was likely not recoverable under 5000 AGL.
by blunte 7y ago
TFA said it was likely not recoverable under 5000 AGL.
- deleted 7y ago[deleted]
- salawat 7y agoDidn't read the entire thing. Going to register later. I actually wonder whether anyone with access to the simulator has tried pulsing the trim switches in sub 4 second intervals. Which depending on how the trim switches work, (I.e. are they continuously coupled, or do they act by moving around a discrete set-point) might be able to fend off MCAS by constantly resetting the time until reactivation long enough to give the trim system time to neutralize. If something like that were done, a recovery below 5000AGL may be possible. It's not by a long shot the most intuitive approach out there, and it doesn't generalize well, but for the specific MCAS behavior that's been revealed it may work. (If there's any 737 pilots out there with insight, I'd be giddy if you'd offer some perspective.)
- dlgeek 7y agoIt sounds like the simulators all this testing were on didn't actually simulate MCAS, so the "fault injection" was done manually. Testing in the way you describe wouldn't provide meaningful results without an MCAS-capable simulator.
- salawat 7y agoHmmm. Then unfortunately we'll have to wait for that to be implemented I suppose. If the algorithm is as it has been described, it may work, but at this point is moot. The damage has been done.