Those airplanes that came from ASA were in horrible condition. Even the FAA commented on how bad they were. There were even some AD's that had never even been done. From the condition of the planes from ASA I would say they have some very scary maintenance. I could be wrong as I don't blame ASA for not taking care of aircraft that they knew they would be losing but they came over in a horrific state of disrepair.

The airplanes that G7 flys for United that are owned by G7 don't have any of the issues that the Delta side has. Same maintenance, so much for your theory.