The LINAC of the European Spallation Source will ac- celerate the proton beam to 2.5 GeV, 98% of this energy is gained using superconducting structures. The supercon- ducting LINAC is composed of two types of cavities, dou- ble spoke resonators and five-cell elliptical cavities. The LINAC, which is five times more powerful than the most powerful existing LINAC, and the spoke cavities that have never been used at such a scale make it necessary to study the effect of one or a few spoke resonators not functioning properly and to find a solution where the defect is compen- sated by retuning of the neighboring cavities.