A turbine ring assembly comprising a plurality of adjacent ring sectors forming a turbine ring extending circumferentially around an axial direction, each ring sector having a platform with, along a radial direction of the turbine ring, an inner face defining the inner face of the turbine ring and an outer face from which an upstream lug and a downstream lug extend along the radial direction, each ring sector comprising a first groove present in the platform in the vicinity of the inner face of said platform, a second groove present in the platform in the vicinity of the outer face of said platform, the first and the second groove extending along the axial direction of the turbine ring, an upstream groove extending radially into the upstream lug and a downstream groove extending radially into the downstream lug, a first sealing tab extending into the first groove, a second sealing tab extending into the second groove, an upstream sealing tab extending into the upstream groove and a downstream sealing tab extending into the downstream groove,
- wherein the second sealing tab includes one or several opening.