Percent of Maintenance Expenses Outsourced
NO ADJUSTMENTS MADE
		1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
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%
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%
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%
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%
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%
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%
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%
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%
jetBlue							7.9%	51.6%	19.2%	27.1%	35.9%	40.7%	44.2%	45.7%
AirTran					28.7%	16.6%	49.6%	54.6%	41.3%	47.2%	50.5%	54.2%	67.0%	67.9%
Frontier					72.7%	58.4%	53.3%	54.0%	52.3%	52.8%	56.8%	51.2%	54.8%	56.0%
ATA		29.9%	28.5%	28.2%	30.3%	25.2%	21.2%	19.1%	10.8%	6.3%	7.1%	14.8%	37.4%	41.0%
--sub LCC		59.8%	62.0%	62.7%	58.0%	52.7%	53.2%	53.7%	51.3%	50.0%	49.7%	50.2%	54.9%	58.5%
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%
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%
Midwest		34.1%	40.7%	38.7%	42.7%	55.3%	44.5%	37.2%	28.7%	21.1%	31.2%	53.1%	55.1%	69.7%
-- sub Other		62.4%	63.5%	62.2%	62.1%	69.7%	66.4%	60.4%	60.8%	56.3%	56.6%	71.9%	59.1%	62.4%
Total All Sectors		22.8%	26.0%	26.3%	28.8%	31.1%	30.6%	30.7%	29.6%	32.4%	35.7%	43.3%	45.9%	47.2%
Note: Shaded data means data appear questionable.
Data Source:  US DOT Form 41 via BTS, Schedule P6 & P52.