What was found
(CAN) PREFORMED AN AIR TURN BACK DUE TO THE WEATHER RADAR NOT WORKING. CREW NOTED THAT THE WEATHER RADAR DISPLAY WAS BLANK ON BOTH SIDES. CIRCUIT BREAKER P6-1, D13 WAS FOUND EXTENDED. ACFT RETURNED FOR MAINTENANCE. THE CIRCUIT BREAKER WAS RESET AND OPS TEST CARRIED OUT IAW AMM 34-43-00-710-803-002, TEST PASSED. NO HISTORY OF WEATHER RADAR DEFECTS GOING BACK 3 MONTHS, THE FAULT WAS DEEMED INTERMITTENT AND ACFT WAS RELEASED FOR SERVICE.