On the fix, validation of the fix, flight test and cert, who is going to do this? If the fix itself was reported to take 40 hours per ac?. Not certain what the fix entails yet, but most likely a very specialized team to do this. How many teams, and how do they decide where to go first?
The airlines then estimate another 100 to 150 hours of prep time per aircraft for flight?
Then the sim time....(after the fix and after the sims have been updated)
This is gonna take a while.