What was found
HYD Y RSVR OVHT ECAM REPORTED BY FLIGHT CREW VIA ARINC TO DISPATCH, CREW C/W QRH AND SHUTOFF HYD Y ENG 2 PUMP. CREW REPORTED THAT THEY HAD NOT RUN THE YELLOW ELECTRIC PUMP. ONLY EDP WAS USED DURING OVERHEAT. OVER HEAT MSG WENT AWAY IN FLIGHT AFTER TURNING OFF THE EDP ACCOMPLISHED TSM 29-13-00-810-802-A NO MESSAGES AND NO FAULTS NOTED. REMOVED AND REPLACED Y CHECK VALVE FOUND IN PART OPEN POSITION(PHOTO ATTACHED) STEP 4(E)1&2. AND AMM 29-24-21-400-001 NO FAULTS NOTED, OPS CHECK NORMAL AND NO LEAKS NOTED.