Maintenance Staff per Billion of Departed Seats
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
American 76 89 95 106 110 109 119 118 119 120 104 104 103 111 105 106 110
Continental 42 41 42 44 46 47 51 53 57 58 56 56 55 59 64 66 60
Delta 42 36 38 42 48 34 36 53 59 56 46 45 51 52 56 45 51
Northwest 45 44 49 61 55 52 51 47 30 26 15 3 3 3 19           -             -  
United 30 14 97 100 102 103 106 53 75 49 47 46 47 67 48 53 55
US Airways 53 55 55 54 51 51 4 52 54 48 32 65 50 44 50 48 49
American West 27 14 14 15 23 21 28 32 32 32 30           -             -             -             -             -             -  
 --sub Network 47 44 63 68 70 67 63 65 69 62 53 54 54 61 62 64 66
Southwest 7 8 8           -   9 9 10 11 12 12 12 11 11 10 11 11 10
jetBlue                    -             -             -             -             -   30 20 21 31 23 23 19 16 17 18 18 17
AirTran                    -             -   33 36 30 30 30 24 21 19 15 14 13 12 11 12 11
Frontier 9 12 19 19 42 48 44 43 30 25 34 31 31 17 20 21 19
Virgin America                    -             -             -             -             -             -             -             -             -             -             -             -   0 5 20 27 27
 -- sub LCC 7 8 9 3 12 13 13 14 15 14 14 13 13 12 13 13 12
Alaska 23 1 22 1 1 26 29 27 25 38 8 6 27 29 31 29 27
Hawaiian 14 14 15 14 2 19 12 15 16 24 16 22 21           -   17 18 17
Allegiant                    -             -             -             -             -             -             -             -   23 35 30 25 22 25 26 36 32
 -- sub Other 19 6 19 6 1 22 22 22 22 33 11 12 25 19 25 26 24
Total All Sectors 42 38 55 57 60 57 53 55 56 51 43 41 41 45 45 46 47
* Total In-House Maintenance Employee Equivalents per billion of departed seats 
Note: Shaded data means data appear questionable.
Data Source:  US DOT Form 41, Schedules P52 & P10