D.C. City Council Chairman Arrington Dixon has removed Nadine P. Winter (D-Ward 6) as the council's representative on the board of the Pennsylvania Avenue Development Corp. and replaced her with Willie J. Hardy (D-Ward 7), his office announced yesterday.

Winter promptly charged that Dixon failed to notify her, and that she learned of her replacement through the grapevine on Tuesday -- five days after Dixon wrote the PADC reporting the change.

Oliver Cromwell, special assistant to Dixon, said it was "my impression that it was pretty well laid out (to Winter) what the chairman was going to do."

Hardy, the new PADC board member, is chairman of the council's Housing and Economic Development Committee and a close ally of Dixon. On becoming council chairman a year ago, Dixon replaced Winter with Hardy as the housing committee chairman and chose Winter for the largely ceremonial post of council chairman pro tem.

In a press release announcing the shift, Dixon said Winter had "served with distinction" and did "an outstanding job" on the PADC.

Winter speculated that Dixon, a supporter of President Carter's reelection, was punishing her for endorsing Sen. Edward M. Kennedy (D-Mass.). Cromwell denied this, asserting that it was logical to have the housing committee chairman sit on the PADC board.

The PADC is the governing body for the government-sponsored redevelopment of Pennsylvania Avenue.