According to @JollyGreen, Disabling Crash Detection in the difficulty settings allows him to pass flight validation. However when attempting to fly, a “Your flight has been cancelled due to changes in prohibited settings.” Therefore not allowing him to fly with the setting off.
After checking the new option in Aviatife settings, I am having the same issue when crash and stress damage is turned off in MSFS. To try an alternative config, I enabled damage in MSFS and kept the option checked Aviatife. When I crashed in MSFS, I still lost my plane and job availability.
Just guessing on how this works, maybe I’m just doing it wrong.