What was found
ELT HAS BEEN DETECTED EMITTING DURING FLIGHT. FOR INFO: IST STATION LOCAL TOWER WARNED US FOR ELT SIGNAL. RELEASED FOR SERVICE PER MEL : 25-63-10-02-A ON ARRIVAL ELT SWITCH (GUARDED) THAT IN THE OVERHEAD PANEL FOUND ARM POSITION. YESTERDAY HAPPENED ONE MORE TIME AND IST LOCAL TOWER WARNED ABOUT SAME ISSUE. FOR PRECAUTIONARY MEL APPLIED. ELECTRICAL CONNECTOR REMOVED AND STOWED. ON THE ELT TRANSMITTER, TOGGLE SWITCH SELECTED TO OFF POSITIONAS PER MEL C/7361233 REMOVED AND REPLACED FIXED ELT PER MM 23-24-01-2, PERFORMED OPERATIOAL AND SYSEM TESTS PER MM 23-24-00-5. ALL TESTS PASSED.