Mexicana Airlines pilots went on strike for...

Mexicana Airlines pilots went on strike for more money, but service was reported normal after President Miguel de la Madrid ordered the 976 pilots to stay on the job . . . San Diego-based Imperial Corp. of America has agreed to sell its mortgage banking subsidiary, ICA Mortgage Corp., to San Francisco-based First Nationwide Bank, a unit of Ford Motor Co., for an undisclosed amount . . . Metromedia Co., Secaucus, N.J., said it has raised its stake in New York-based Orion Pictures Corp. to the equivalent of 19.2% of the common shares outstanding . . . H. F. Ahmanson & Co., of Los Angeles, said it completed its acquisition of Tucson Savings & Loan for an undisclosed amount of Ahmanson common stock.