Table 4: System* Quarterly Operating profit/loss margin (in percent),,,,,,, Regional Carriers ,,,,,,, Ranked by 3rd Quarter 2007 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue) ,,,,,,, 3Q 2007 Rank,Regional Carriers,3rd Quarter 2006 (%),4th Quarter 2006 (%),1st Quarter 2007 (%),2nd Quarter 2007 (%),3rd Quarter 2007 (%),3rd Quarter Operating Profit/Loss $(Millions) 1,Atlantic Southeast,12.1,13.1,12.9,11.6,12.9,42 2,Pinnacle,12.3,29.8,9.0,9.1,10.4,16 3,Sky West,9.6,7.3,7.6,9.1,9.5,51 4,American Eagle,9.8,10.1,11.2,10.3,6.5,33 5,Comair,6.8,4.6,2.5,7.0,5.6,16 6,Mesa ,3.7,4.3,-8.2,3.1,3.6,10 7,Express Jet,8.4,8.3,3.8,-10.3,-8.1,-35 ,Seven-Carrier Total,8.9,10.0,6.3,5.7,5.3,132 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,, * System = domestic + international,,,,,,,