Some difficulty in following the digital discussions, but is the cure entirely in Boeing hands.
Boeing must be involved with the overall specification and hold certification responsibility, but the ‘box of digits’ is probably made elsewhere.
If the problems are in the FGC, then who make this - Collins ?
To what extent will changes affect other high integrity functions - AP, Cat 3, etc. The digital processing and software has to be revalidated to the latest standards, but what further proof could be required is approving operational aspects ?