Members of American Airlines’ mechanics union rejected a contract proposal and authorised union leaders to call a strike, the Transport Workers Union (TWU) said yesterday.

The union said on its website late on Tuesday that two American Airlines work groups represented by the TWU -- the mechanics and the stock clerks -- voted against a provisional pay deal.

A third bargaining unit -- the technical specialists -- approved their deal.

“Our members have spoken loud and clear,” said TWU International vice president Garry Drummond, who heads the union’s Air Transport Division. “After four years of negotiations, a majority of TWU members ... were not convinced that this agreement represented an adequate return,” he added.