AMR Corp. said its directors has approved...

AMR Corp. said its directors has approved the acquisition of Wings West Airlines by an AMR subsidiary, subject to the satisfactory resolution of certain issues . . . Industrial Equity (Pacific) Ltd., the Hong Kong investment firm controlled by New Zealand financier Ronald A. Brierley, has agreed to postpone its plan to acquire Los Angeles-based CalMat Co. for 30 days . . . The Investment Company Institute reported that the assets of the nation’s 421 money market mutual funds fell $850.6 million to $273.93 billion in the week ended April 20 . . . Armtek Corp.’s board approved the previously reported sale of its Armstrong Tire Co. subsidiary to Italy’s Pirelli Group for $190 million . . . An investor group led by Robert M. Cohen of Huntington, N.Y., has raised its interest in RCM Technologies Inc.’s common stock to 6.05%, or 618,175 shares, according to a filing with the Securities and Exchange Commission. RCM is a personnel supply firm based in Los Angeles . . . Initials Plus Inc., San Francisco, announced that discussions with Hosiery Corp. of America for an investment by HCA in Initials Plus have been terminated.