American Airlines gave employees across the board raises without insisting that the pay changes be part of a contract. The airline says that’s made it harder to get mechanics to agree to a contract. American mechanics have already gotten much of the money they’re going to get with a new contract, so there’s less incentive for employees to agree to rules changes the airline wants.
The carrier is offering terms they say are more costly than what United and Delta have with their mechanics, so a common refrain from management has been that they would happily sign either the United or Delta deal today.