phollingsworth wrote:DenverTed wrote:sgrow787 wrote:
I read recently they are reinserting the column stab cutout in the Max update (and removing the MCAS column electric trim cutout). So maybe this is one of the mitigating factors to address the flip-bit (easier to say) issue. Because comparing FCC outputs in a fail-safe design seems more difficult to me. And we have an indication (by a TC employee) that removing MCAS altogether might be an option.
If the column stab cutout shuts off MCAS, then how would MCAS work? Unless the cutout is at a force beyond what is needed to pull into a stall with MCAS. Because, pulling into a stall with MCAS generating more column force through the final degrees (or deceleration) are the mandated tests.
I have no idea if the aft column cutout is coming back. It exists for STS which is also a stall identification augmentation. So in theory it should be possible to define an aft column cutout for 1g MCAS. My understanding is that it was removed to allow it to work in the wind-up turn condition. It could be that it comes back in 1g, though that would increase the complexity of the software logic.
Could well be Mr Marko's functionality description for 12.1.1 software:
'SW Column Cutout'