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A combustion chamber louver assembly includes an aft louver having a forward panel 24 that extends axially from a louver leading edge 26 to a corner 28, and a forward louver joined to the forward panel of the aft louver. A lip 48 defined by a portion of the forward louver that extends axially past t

A combustion chamber louver assembly includes an aft louver having a forward panel 24 that extends axially from a louver leading edge 26 to a corner 28, and a forward louver joined to the forward panel of the aft louver. A lip 48 defined by a portion of the forward louver that extends axially past the corner to a louver trailing edge 36 includes circumferentially distributed trailing edge slots 60 extending forwardly from the trailing edge a nominal distance equal to about 88% to 95% of the length L of the lip.

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1. A combustion chamber louver assembly, comprising: an aft louver having a forward panel that extends axially aft from a louver leading edge to a corner of the forward panel of the aft louver; anda forward louver joined to the forward panel of the aft louver and having a lip defined by a portion of

1. A combustion chamber louver assembly, comprising: an aft louver having a forward panel that extends axially aft from a louver leading edge to a corner of the forward panel of the aft louver; anda forward louver joined to the forward panel of the aft louver and having a lip defined by a portion of the forward louver that extends axially aft past the corner of the forward panel of the aft louver to a louver trailing edge, the lip having a length L and including circumferentially distributed trailing edge slots extending forwardly from the trailing edge a nominal distance equal to about 88% to 95% of the length of the lip. 2. The louver assembly of claim 1 wherein the nominal distance is equal to about 95% of the length L of the lip. 3. The louver assembly of claim 1 wherein the aft louver is a radially outer louver and the forward louver is a radially inner louver. 4. The louver assembly of claim 1 wherein the slots are keyhole slots. 5. The louver assembly of claim 1 including a bulkhead projecting from the corner and wherein fluid admission holes penetrate the bulkhead. 6. The louver assembly of claim 5 wherein the fluid admission holes are not all equal in size. 7. The louver assembly of claim 1 in which circumferentially distributed flexure slots define a series of tabs in the forward panel. 8. The louver assembly of claim 7 in which the flexure slots are circumferentially aligned with the trailing edge slots. 9. The louver assembly of claim 1 including a bulkhead projecting from the corner and fluid admission holes penetrating the bulkhead and wherein circumferentially distributed flexure slots define a series of tabs in the forward panel, the flexure slots extending from the leading edge to an associated fluid admission hole. 10. The louver assembly of claim 1 wherein the forward louver is joined to the forward panel of the aft louver by a weld joint. 11. A turbine engine combustor can including the louver assembly of claim 1. 12. An annular turbine engine combustor liner including the louver assembly of claim 1. 13. The combustion chamber louver assembly of claim 1 wherein the forward louver is a radially inner louver including circumferentially distributed flexure slots defining a series of tabs, the aft louver is a radially outer louver and wherein the trailing edge slots reduce reducing radial thermal growth related crack susceptibility in the forward panel of the aft louver. 14. A method of upgrading a combustion chamber liner having multiple, axially adjacent louvers, comprising the steps of: cutting through a selected louver to separate an aft end of the selected louver and louvers aft of the selected louver from a residual forward end of the selected louver, the selected louver being a louver forward of a louver that requires an upgrade; andsecuring an upgraded louver assembly to the residual forward end of the selected louver, wherein one of the separated louvers aft of the selected louver has a lip devoid of trailing edge slots and wherein the upgraded louver assembly includes an upgraded counterpart of the one louver, the upgraded counterpart including a lip with a lip length L and also including trailing edge slots measuring about 88% to 95% of the lip length L. 15. The method of claim 14 wherein the trailing edge slots measure about 95% of the lip length L. 16. The method of claim 14 wherein the liner has eleven louvers and the selected louver is the forwardmost of the eleven louvers. 17. A method of upgrading a combustion chamber liner having multiple, axially adjacent louvers, comprising the steps of: removing an unslotted louver from the liner; andsecuring a slotted louver having trailing edge slots measuring about 88% to 95% of a length L of a louver lip to the combustion chamber liner in place of the unslotted louver. 18. The method of claim 17 wherein the trailing edge slots measure about 95% of the length L of the louver lip.