What was found
AT APPROX 18:00, AFTER TAKEOFF AND CLIMBOUT, THE RT SIDE OF THE COCKPIT WENT DARK. THE PILOT RETURNED TO DEPARTURE AND LANDED WITHOUT INCIDENT. HAD MFG TECH TROUBLESHOOT THE PROBLEM TO AN OPEN, PN ANL-325 (325 AMP) RT BUS CURRENT LIMITER WITH NO EXPLANATION FOR THE FAILURE. THE LIMITER WAS REPLACED AND NO FURTHER FAULT WAS FOUND. THE SAME SCENARIO OCCURRED IN APRIL OF THIS YEAR ON THE LT SIDE OF THIS ACFT ON TAKEOFF. THIS TOO WAS TROUBLESHOT, WITH NO FAULTS FOUND OTHER THAN THE OPEN ANL-325 LIMITER. TECH SERVICES FOR ACFT MAKE WAS ASKED, HE HAD NO SUGGESTIONS AS TO THE POSSIBLE CAUSES FOR THE SIMILAR FAILURES OF THE ELEC SYS.