United Again Denied U.S. Aid to Emerge From Chapter 11
Air Transportation Stabilization Board denies United Airlines goverment loan package for third time, and airline will not get fourth chance; United faces daunting task of emerging from Chapter 11 bankruptcy protection without federal aid it was counting on; is expected to turn to its workers for new cuts in jobs, wages and benefits on scale nearing $2.5 billion each year that they have already accepted since airline filed bankruptcy in 2002; problems facing chief executive Glenn F Tilton detailed; chart; photos (M)
