What was found
(CAN) WHILE INBOUND TO DESTINATION ACFT HAD A MOMENTARY AC BUS 1 ELECTRICAL PWR INTERUPTION. CREW RECEIVED LT WINDOW AND WINDSHEILD CAUTION MESSAGES. ALSO, LOST LT SIDE WALL LIGHTS AND CABIN EMERGENCY LIGHTS CAME ON. FAULTS CLEARED AFTER A FEW SECONDS WITH NO ACTION FROM THE CREW. ACFT LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING LED MX TO REPLACE THE K1XD RELAY P/N VS-643 IN JB6 IPC REF 24-01-06 FIG 1. OP CHECKS INCLUDING ENG RUNS COMPLETED AND SYS CHECKED SERVICEABLE.