What was found
(CAN) ON APPROACH CREW RECEIVED WING ANTI ICE FAULT STS MSG FOLLOWED BY DC BUS 1 CAUTION MESSAGE. AIR TURN BACK MAINTENANCE FOUND CB`S D6, D7 AND THEIR BUS BAR OVERHEATED. REPLACED C/B`S AND BUS BAR. PARTS REPLACED: BUS BAR CIRCUIT BREAKER D6 (80A) CIRCUIT BREAKER: D7 (3A) BUS BAR: S6938-1 CIRCUIT BREAKER D6 (80A): MS25361-80 CIRCUIT BREAKER D7 (3A): MS22073-3 (TC NR 20071003002)