A turbine engine component comprising: a wall extending from a leading edge to a trailing edge , the wall including a hot side surface for facing a gaspath when installed, and a cold side surface opposite said hot side surface ; at least one minicore cooling circuit (190; 390) disposed between said hot side surface and said cold side surface within said wall ; at least one cooling fluid inlet for connecting a trailing edge plenum of the at least one minicore cooling circuit (190; 390) to a coolant source wherein the at least one cooling fluid inlet is at least one impingement cooling fluid inlet ; and a plurality of film cooling holes connecting said at least one minicore cooling circuit (190; 390) to said hot side surface , wherein the at least one minicore cooling circuit (190; 390) includes a leading edge plenum having a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit (190; 390) normal to the hot side surface , the leading edge plenum (316; 418) being a portion of the at least one minicore cooling circuit (190; 390) most proximate to the leading edge , wherein the leading edge plenum is configured to reverse a flow direction of a coolant passing through the at least one minicore cooling circuit (190; 390), wherein the trailing edge plenum has a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit normal to the hot side surface , the trailing edge plenum being a portion of the at least one minicore cooling circuit most proximate to the trailing edge , wherein at least one of the film cooling holes connects the leading edge plenum to the hot side surface characterised in that : another at least one of the film cooling holes connects the trailing edge plenum to the hot side surface . a wall extending from a leading edge to a trailing edge , the wall including a hot side surface for facing a gaspath when installed, and a cold side surface opposite said hot side surface ; at least one minicore cooling circuit (190; 390) disposed between said hot side surface and said cold side surface within said wall ; at least one cooling fluid inlet for connecting a trailing edge plenum of the at least one minicore cooling circuit (190; 390) to a coolant source wherein the at least one cooling fluid inlet is at least one impingement cooling fluid inlet ; and a plurality of film cooling holes connecting said at least one minicore cooling circuit (190; 390) to said hot side surface , wherein the at least one minicore cooling circuit (190; 390) includes a leading edge plenum having a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit (190; 390) normal to the hot side surface , the leading edge plenum (316; 418) being a portion of the at least one minicore cooling circuit (190; 390) most proximate to the leading edge , wherein the leading edge plenum is configured to reverse a flow direction of a coolant passing through the at least one minicore cooling circuit (190; 390), wherein the trailing edge plenum has a thickness normal to the hot side surface that is larger than a thickness of the majority of the at least one minicore cooling circuit normal to the hot side surface , the trailing edge plenum being a portion of the at least one minicore cooling circuit most proximate to the trailing edge , wherein at least one of the film cooling holes connects the leading edge plenum to the hot side surface characterised in that : another at least one of the film cooling holes connects the trailing edge plenum to the hot side surface . <EOS>