TABLE 6.15					
OPERATING EXPENSES SYSTEM ALL SERVICES						
LARGE CERTIFICATED AIR CARRIERS							
MEDIUM REGIONAL GROUP								
1984 - 1993		
(Thousands of Dollars)											

     Total Oper.                         Generaland  Depreciation   Transport
     Expenses 1/Flying Oper. Maint.      Admin.      Amoritization  Related	
Year Amount  %  Amount   %   Amount  %   Amount  %   Amount %       Amount   %
1983 111713 100  68130 	61.0  17693 15.8  18327 16.4  7353  6.6     210     0.2 
1984 159680 100  89995 	56.4  21572 13.5  37866 23.7  9885  6.2     361     0.2 
1985 151527 100  79920 	52.8  22585 14.9  42703 28.2  5179  3.4    1140     0.7 
1986  87359 100  45435 	52.0  14515 16.6  17436 20.0  2616  3.0    7356     8.4
1987 120019 100  56061 	46.7  25533 21.3  27351 22.8  6269  5.2    4803     4.0 
1988  76823 100  32629 	42.5  18191 23.7  18779 24.4  5731  7.5    1494     1.9 
1989  91518 100  43560 	47.6  15469 16.9  21400 23.4  1214  1.3    9876    10.8 
1990  87081 100  51067 	58.6  15643 18.0  16684 19.2  3636  4.2      50     0.1 
1991  77958 100  46994 	60.3  12439 16.0  14485 18.6  2892  3.7    1149     1.5 
1992 218594 100 129486 	59.2  43051 19.7  36005 16.5  8309  3.8    1743     0.8 
1993 758615 100 309160 	40.8 149115 19.7 272306 35.9 16569  2.2   11465     1.5 	 
    1/  Details may not add to total due to rounding.			
    2/ Revised.									
    3/ Preliminary.													
      Source:  Air Carrier Financial Statistics Table 3 -- RSPA													
Note:  Wide fluctuations in total revenues and expenses are caused by 
fluctuations in the number of medium regional carriers.  Some have been upgradedto large regional carriers and some have gone out of business.  For list of 
medium regional carriers see Air Carrier see Air Carrier Financial Statistics 
for year in question.