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Boeing 737 max grounding - Coggle Diagram

- - - - design error
        
        engine position change
      - MCAS
        
        Error Occurred
        
        Manual operation of wrong angle
        
        Only one AOA sensor is recognized
        
        Sold as an AOA sensor option
    - - Delegating evaluation to Boeing
      - engineer dunning
      - inappropriate evaluation
        
        Use of numbers that do not match the actual machine
        
        Tail wing angle manipulation of 0.6 degrees, actually 2.5 degrees
- - - - much cheaper
  - - - Cancellation of 737 successor model development
      - A320neo = A320 improved version
    - - Even the safety device is sold as an option
    - - No pilot retraining required
      - Reduced training cost and time investment
- - - - The selling point is that there is no need for retraining, is the pilot responsible for not training?