What was found
(CAN) LT ALTERNATOR FAILED AT CRUISE, FAULT-FIELD POWER FUSE BLOWER. RT ALTERNATOR FAILED/NOT ON LINE, FAULT, BAD ALTERNATOR MASTER SWITCH OR NOT ON. RT INOP ALTERNATOR SWITCH/RELAY FAILED SO NO COCKPIT INOP LIGHT. AC CONTINUED FLIGHT ON BATTERY POWER TO DESTINATION. FLIGHT AT NIGHT -30C AND IFR CONDITIONS. CONCLUSIONS/RECTIFICATIONS: LT FIELD FUSE REPLACED. RT ALTERNATOR INOP SWITCH REPLACED. ALTERNATOR MASTER SWITCH CLEANED/TESTED. BATTERY CHARGED AND TESTED. AC AND ALTERNATOR SYS OPS CHECKED AND AC RETURNED TO SERVICE. (TC NR 20070312009)