Former Boeing CFO Pleads Guilty  ALEXANDRIA, Va. (Reuters) - Former Boeing Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BA.N target=/stocks/quickinfo/fullquote"&gt;BA.N&lt;/A&gt; Chief  Financial Officer Michael Sears pleaded guilty on Monday to one  felony count of aiding the illegal hiring of a U.S. Air Force  official for a top job at the company.