The National Mediation Board has rejected claims of interference by the International Association of Machinists and Aerospace Workers (IAM), following an election this month when Delta Air Lines' TechOps maintenance stores staff rejected representation by the union.
The SkyTeam carrier received notification of the board's decision today, it said.
"Since the merger's close, our people have expressed the desire to move forward as one team," said Tony Charaf, Delta TechOps president. "We are pleased that the voices and votes of our professional men and women in TechOps were heard. Now we can immediately begin the process of aligning pay, benefits and work rules for our people."
In the election earlier this month, only 166 out of 607 votes cast were in favour of representation by the IAM.
This followed a similar rejection by Delta's flight attendants of union representation by the Association of Flight Attendants-CWA (AFA).
The AFA also filed a claim of interference, but this claim was rejected by the board on 18 November, said Delta.
"Interference claims are still pending relating to the representation elections for fleet service and passenger service employees," it added.