What was found
(CAN) DURING REFUEL THE FUELER REPORTED THAT THE #1 FUEL VALVE WAS INTERMITTENT. MAINTENANCE INVESTIGATED AND OBSERVED SMOKE FROM THE REFUEL/DEFUEL PANEL. THE PANEL WAS REMOVED FROM THE AIRCRAFT AND FURTHER TROUBLESHOOTING REVEALED THAT THE L/H FUEL OPEN LIGHT WAS WELDED INSIDE THE SOCKET. THE REFUEL DEFUEL PANEL WAS REPLACED WITH A SERVICEABLE PART FROM STOCK. PN 366-028-002, SN 1597. AIRCRAFT HOURS: 21653, AIRCRAFT CYCLES: 16288.