US Airways chief financial officer resigns = = = = Monday May 3, 6:09 PM EDT = CHICAGO, May 3 (Reuters) - US Airways said on Monday that Chief Financial= Officer Neal Cohen has resigned, a year after the carrier emerged from b= ankruptcy and following Chief Executive David Siegel's recent decision to= step down. Dave Davis, previously the airline's senior vice president of finance, wi= ll replace Cohen, effective immediately. Cohen had an option in his employment contract, similar to the one exerci= sed by Siegel, that permitted him to leave the company with certain benef= its. Siegel's option entitled him to collect roughly $5 million in severa= nce. = =A92004 Reuters Limited. = Roger EWROPS