a combustion liner 56 comprises an inner wall 57 an outer wall 58 a first liner end 59 and a second liner end 60 with a seal 61 fixed to and encompassing outer wall 58 proximate second liner end 60 seal 61 which seals against transition duct 62 also includes a means for passing cooling air through seal 61 the sealing interface region and aft end of combustion liner 56 is shown in greater detail in fig4 further details regarding the means disclosed for passing cooling air through seal 61 is shown in fig5 a and 5b specifically two configurations are shown that each comprise a plurality of openings 63 that pass a first supply of cooling air through seal 61 to cool outer wall 58 of combustion liner 56 proximate second liner end 60 in order to provide surface cooling to inner wall 57 proximate second liner end 60 a second supply of cooling air is directed along inner wall 57 for cooling the aft end region of combustion liner 56 the second supply of cooling air can be directed along inner wall 57 by a variety of means most commonly through a plurality of precisely sized cooling holes located in combustion liner 56 proximate the region requiring cooling the cooling air ca entering the flow sleeve inlet region is used for three purposes proximate the aft end of combustor 40 each of these locations benefit from the flow sleeve redesign to reduce the pressure loss to the cooling air referring now specifically to.