Dozy -
"For one thing, if we take KAL's vastly improved safety record since the top-down operational and safety overhaul a little over a decade ago into account, its apparent success certainly appears to clearly indicate that the oft-cited "cultural issues" can be overcome"
Read the interviews. Lots of comments about higher and lower status. It's alive and well in their cockpit. The issue is was it, or was it not, part of the cause?
Training checks are scripted.
The investigation needs to look into the statement about 'scripted' check rides. AQP is also somewhat scripted.