From : "After Lion Air crash, Boeing doubled down on faulty 737 MAX assumptions
Nov. 8, 2019 at 6:42 pm Updated Nov. 8, 2019 at 7:57 pm By Dominic Gates" :
A flawed process
The U.S. House Transportation and Infrastructure Committee, which displayed one slide from Boeing’s presentation during an appearance by CEO Muilenburg at a hearing last week, provided all 43 slides in the document at the request of the Seattle Times. The presentation is titled “MCAS Development and Certification Overview.”
It notes that MCAS was not evaluated as an individual system that was “new/novel on the MAX.” The significance of this term is that the FAA is required to be closely involved in the testing and certification of any new and novel features on an aircraft.
Though MCAS was new on the MAX version of the 737, Boeing argued that it wasn’t new and novel because a similar system “had been previously implemented on the 767” tanker for the Air Force.
Yet MCAS on the MAX was triggered by just one of the jet’s two angle-of-attack sensors, whereas MCAS on the 767 tanker compared signals from both sensors on the plane. When asked after the second crash to explain why the airliner version lacked this same redundancy, Boeing’s response was that the architecture, implementation, and pilot interface of the KC-46 tanker MCAS were so different that the two systems shared little but the acronym."
How can Boeing seriously square these contradictory statements? MCAS is similar and dissimilar at the same time?
This is 'Alice in Wonderland' time :
“When I use a word,” Humpty Dumpty said, in rather a scornful tone, “it means just what I choose it to mean—neither more nor less.” “The question is,” said Alice, “whether you can make words mean so many different things.”