DAL acquired (IIRC) 14 Airbus A-310-300's and 7 A-310-200's when they purchased some of Pan Am's operation in 1991. After that DAL leased several (I don't remember how many) new A-310's from Airbus under very good terms. (They also traded the -200's to FedEx for 727 hush-kits.)

When Delta decided to return those aircraft Airbus sued Delta. As I recall, as parts on those aircraft needed replacement, Delta used parts that they had on hand (which they had acquired from Pan Am). Those parts were manufactured before the leased A-310's and Airbus refused to accept the return of those aircraft with older parts.

Those airframes sat outside the jetbase in ATL for many months.

While I'm sure that left a very sour impression in DAL managements mind, and I doubt that team would buy an Airbus product, that management team is now gone.