What was found
(CAN) REPEATED STANDBY PITOT HEAT CAUTION IN FLIGHT, PITOT TUBE AND TMU WERE REPLACED BUT THE DEFECT RETURNED, MTC`S TROUBLESHOOTING INDICATE THAT TAPPING THE RELAY RECTIFIED THE FAULT. THE RELAY WERE PREVIOUSLY REPLACED 9 DAYS AGO. THE 3000-K5 RELAY WERE REPLACED AND THE STANDBY PITOT HEAT WERE TESTED WITH NO FURTHER FAULT NOTED. NO REPEATED FAULT NOTED TO DATE. (TC# 20190722013)