US Airways Says Not Selling Aircraft  SAN FRANCISCO (Reuters) - US Airways &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=UAIRQ.OB target=/stocks/quickinfo/fullquote"&gt;UAIRQ.OB&lt;/A&gt; said on  Saturday it has no current plans to reduce its fleet of  aircraft, disputing postings on the Internet that the bankrupt  carrier has put planes up for sale.