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Old 27th Apr 2019, 09:02
  #4424 (permalink)  
bill fly
Join Date: Feb 2015
Location: The woods
Posts: 1

Specifically: Boeing designed and placed into service an airplane with an active control system that had unilateral control over the horizontal stabilizer, with enough authority to place the airplane in an unrecoverable state if just a single component failed. Further this system gave no indication to the pilots that it was operating, or when malfunctioning that it was operating in error. Additionally this system, which was created solely to increase the amount of force required to pitch up the aircraft at high AOA used the most critical part of the airframe to do this minimal task, instead of using a passive system that had no control authority

Yep. So it is. And still they are faffing around with MCAS to get it recertified.
The only honest way out of this, and it isnít cheap, is a dedicated feel augmentation within the control run. Can be a spring, or a feel unit mod, as suggested way back, but not yet more tampering with the stabiliser.
I never liked the STS on the 300 and since then B have made use of stab tinkering for other sorts of cases - tankers etc. When we did a max fuel transfer on the Victor, we had to keep both of the aircraft in trim - and we did this by trimming as required, without some background programme interfering.
I guess the most important phrase here is isnít cheap.
These days that is enough reason for not doing the honest solution.
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