Originally Posted by rickair7777

Which airline was this? A major?

If they won't tell you, it might have been a bad reference call, ie one of your references or former employers had an axe to grind (hopefully you know your references better than that).

Might also have been background check. Pull ALL of your NDR, FAA, and PRIA info from former employers (hopefully you checked the box that you wanted copies. Pay for a comprehensive background check to make sure you don't have serious felonies on your record which you weren't aware of.