Originally Posted by
HalinTexas
Since they followed and summarily rejected the QRH and improvised, then who is at fault, or at least share fault? There was no reason to turn the electric trim switches back on, but since they did, they should have used it! If they had, they could have saved the airplane.
I'll subscribe to your shared responsibility argument. The legal people will split that down into percentages from the following:
1. Aerodynamic development that led to poor static stability at high AOAs.
2. Inadequately deigned software add-on (MCAS) to
hide comply with static instability issue.
3. Single point of failure (AOA gauge) in safety critical flight control system.
4. Inadequate training and documentation.
5. Poor Boeing assessment of systematic failures that led to Lion Air crash - initial AD.
6. Failure by Lion Air #1 to articulate and capture problem after first, non-fatal event.
7. Regulatory oversight, lack of?
8. Two slightly dull/average/unlucky crews faced with multiple inputs.
I'll wager that the crew 'percentage' will not be the biggest number.