 During 2008 and 2009, the 747-100 and 747-200 aircraft were retired, replaced by the 747-400s and MD-11Fs.In 2009, UPS Airlines retired its entire fleet of DC-8 aircraft; at the time, its 44 aircraft represented nearly half of the active DC-8 fleet flying worldwide.On February 8, 2010, UPS announced the plans to furlough at least 300 pilots in 2010 and 2011, cancelling a 2009 agreement between the company and the Independent Pilots Association.