MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures

[OldnGrounded]

Originally Posted by Zeffy

All 43 pages of the Boeing presentation MCAS Development and Certification Overview.

I second the thanks!

On first read-through, problematic dodging, bobbing and weaving are apparent. Seems like a lot of CYA effort that no informed reviewer taking a hard look would be likely to quietly accept.

Example from page 14 of the document:

I'm going to guess that means that countering single unintended MCAS activation by "elevator alone" applies to a single, max. 2.5 unit movement of the stabilizer, not to the combined effects of multiple (presumably pilot-interrupted) movements caused by unintended activation. Unless, of course, Boeing is confident that "elevator alone" recovery is possible after MCAS has run the stab to the stops.

Also, from page 35:


Discussed but not documented and then . . . not referenced.

There's a lot more in the document. I'm sure others will find and share.