Percent of Maintenance Expenses Outsourced
NO ADJUSTMENTS MADE
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
American 18.5% 18.8% 16.4% 20.7% 25.5% 25.3% 24.6% 22.5% 22.0% 25.8% 24.8% 24.3% 25.5% 25.4% 25.3% 24.3% 24.4% 25.7% 30.3% 29.4% 39.0% 38.1% 38.5% 38.8% 41.4%
Continental 45.5% 45.1% 48.6% 41.8% 46.9% 46.5% 40.3% 35.2% 39.2% 42.6% 46.2% 48.1% 49.2% 47.7% 44.5% 42.2% 46.6%
Delta 12.5% 19.8% 17.3% 23.7% 24.4% 21.0% 23.6% 25.9% 23.8% 23.9% 34.9% 43.9% 36.2% 31.0% 25.9% 39.3% 38.3% 41.5% 41.8% 36.7% 41.1% 42.9% 45.8% 53.7% 59.8%
Northwest 18.5% 22.1% 24.0% 26.6% 26.4% 24.4% 28.0% 27.5% 36.7% 34.9% 56.8% 72.0% 73.6% 68.9% 60.7%
United 7.7% 9.1% 13.6% 15.0% 16.2% 16.3% 18.4% 16.7% 21.3% 33.0% 40.5% 44.9% 45.7% 44.3% 40.6% 40.0% 51.5% 47.8% 52.1% 52.6% 52.1% 51.3% 52.0% 52.0% 47.6%
US Airways 29.4% 30.9% 28.8% 29.3% 29.1% 29.5% 29.2% 28.8% 35.0% 36.7% 57.6% 52.3% 58.3% 63.7% 60.4% 57.6% 57.8% 56.5% 54.2% 54.3%
America West 48.1% 74.1% 73.5% 74.4% 73.7% 73.1% 67.8% 68.6% 67.3% 64.0% 69.0%                            
 --sub Network 19.1% 22.2% 22.8% 25.4% 27.5% 26.7% 27.1% 26.0% 28.9% 32.5% 40.8% 43.8% 44.4% 43.3% 39.0% 37.8% 40.9% 41.2% 43.6% 41.8% 43.7% 43.6% 44.9% 46.6% 47.1%
Southwest 68.5% 67.9% 66.0% 67.2% 67.1% 64.8% 62.2% 62.8% 59.0% 58.8% 56.3% 56.2% 60.4% 61.3% 61.7% 60.1% 59.0% 60.8% 59.7% 58.2% 56.2% 51.7% 52.8% 53.6% 50.2%
jetBlue 7.9% 51.6% 19.2% 27.1% 35.9% 40.7% 44.2% 45.7% 49.9% 53.7% 54.5% 59.7% 66.3% 69.5% 68.4% 71.9% 73.6% 74.6% 71.0% 70.0%
AirTran 28.7% 16.6% 49.6% 54.6% 41.3% 47.2% 50.5% 54.2% 67.0% 67.9% 69.4% 72.4% 74.5% 70.7%
Frontier 72.7% 58.4% 53.3% 54.0% 52.3% 52.8% 56.8% 51.2% 54.8% 56.0% 59.1% 36.7% 7.8% 0.3% 0.1% 56.1% 46.3% 47.6% 51.2% 45.1% 39.1% 36.8%
Virgin America                             49.0% 48.0% 40.6% 32.5% 25.9% 40.2% 58.7% 39.5% 67.4%    
 --sub LCC 70.6% 72.7% 72.7% 64.2% 57.8% 61.1% 60.3% 57.8% 54.9% 55.3% 53.5% 55.8% 58.9% 60.5% 60.8% 59.0% 57.9% 58.7% 61.0% 59.9% 60.1% 57.4% 59.7% 58.3% 55.0%
Alaska 57.0% 55.6% 55.6% 54.3% 61.6% 62.7% 54.7% 58.9% 56.9% 58.0% 76.6% 56.6% 57.0% 54.7% 56.0% 55.9% 53.3% 52.1% 56.5% 51.0% 51.1% 49.2% 52.0% 62.8% 59.6%
Hawaiian 75.2% 78.3% 78.1% 80.2% 86.1% 81.6% 81.1% 75.4% 69.0% 64.9% 66.8% 67.9% 71.6% 74.5% 74.1% 74.7% 78.6% 79.1% 78.1% 78.4% 78.7% 74.7% 71.6% 75.5% 71.4%
Spirit 87.0% 137.5% 76.7% 70.7% 69.4% 79.4% 50.7% 33.3% 17.1% 14.5% 32.6% 14.3% 15.6% 25.4% 26.1% 29.9% 27.8% 23.9% 23.1% 20.9% 20.9%
Allegiant                       3.4% 4.0% 2.4% 2.7% 3.3% 2.5% 4.7% 20.8% 32.3% 30.2% 27.7% 19.7% 8.0% 8.0%
 -- sub Other 68.0% 71.8% 70.8% 72.4% 73.7% 73.0% 65.4% 65.1% 61.2% 62.5% 70.6% 54.6% 53.9% 52.0% 54.7% 52.3% 52.1% 55.7% 56.6% 54.7% 53.4% 49.2% 46.9% 52.0% 49.9%
 Total All Sectors  22.7% 26.1% 26.4% 28.9% 31.2% 30.8% 31.0% 30.0% 33.0% 36.4% 43.6% 45.8% 46.9% 46.3% 43.3% 42.1% 44.4% 45.3% 47.8% 46.0% 47.8% 47.0% 48.0% 49.6% 49.2%
Data Source:  US DOT Form 41 via BTS, Schedule P6 & P52.