The president of the American Federation of Government Employes (AFGE) yesterday denied a newspaper report that the AFL-CIO will re-evaluate its endorsement of President Carter's plan to overhaul the Civil Service. A story in The Washington Star yesterday reported that the executive council of the AFL-CIO-backed AFGE had voted to oppose many of the key provisions of President Carter's plan, "previously agreed to by the AFGE and the AFL-CIO, thereby placing much of the Carter plan in serious jeopardy."

The union has from the beginning reserved the right to take issue with the "key provisions" in question, according to AFGE president Kenneth Blaylock. Those provisions involve virtually every aspect of the President's legislative package dealing with due process for employes and with "politicization" of government management.

The situation obviously is "complex," Blaylock said, "but to be against change is to be for the status quo." He said the unions' support for the package "in principle" stands.

The union endorsement was part of a deal with the administration agreed to in exchange for a strengthening of federal unions' collective bargaining position. The details are still to be worked out and have caused some dissension in the ranks.

The AFGE executive council is made up of 15 regional vice presidents. Blaylock was elected by the union membership over the opposition of 10 of the vice-presidents, according to an AFGE spokesman.