A Southwest Airlines 737 takes off from Midway Airport, Tuesday, Sept. 1, 2009 in Chicago. Southwest Airlines Co. is facing a Tuesday deadline to settle a dispute with regulators over the use of unapproved parts. AP Photo logo AP Photo 2 months ago

A Southwest Airlines 737 takes off from Midway Airport, Tuesday, Sept. 1, 2009 in Chicago. Southwest Airlines Co. is facing a Tuesday deadline to settle a dispute with regulators over the use of unapproved parts.