Screwdriver.
The Delta Audit of Korean Air has never been published.
The report you are seeking is a set of observations of two unqualified auditors, appointed to report to Delta, along with a bunch of others. The real Delta report was an internal document which highlighted various deficiencies which have been addressed in the ensuing 6 or 7 years.
If you wish to give credance to the report you seek, consider the worth of such comments as, "the pilot had his armrests down during takeoff" (or words to that effect). Coincidently, I have audited the author of that little gem, and guess what, he had his armrests down during takeoff. But who gives a ****.
Caveat Emptor
Maui