What was found
AIRCRAFT RETURNED OF FLIGHT, "ANTENNA FAIL" LIGHT TURNED ON AND CAPTAIN TURNED OF RADAR. ANTENNA CONNECTOR WAS CLEANED AND CIRCUIT BREAKER WAS RESEATED IAW MM 34-41-01, AND AIRCRAFT WAS REFUELED, ALL CORRECT. DURING OVERNIGHT SERVICE, CONNECTOR WAS CLEANED IAW 31-10-04 AND WIRING WAS CHECKED IAW MM 34-43-02, TEST CORRECT IAW MM 34-41-00.