What was found
TANK 2L AFT PUMP LO LEVEL 1 ALERT IN CRUISE FLIGHT. COMPLIED WITH LEVL 1 QRH CHECKLIST FUEL PUMP TNK 2, LT C/B (G-17) WAS POPPED BY FUEL PUMP. IN ADDITION, THERE WAS A SIGNIFICANT EVIDENCE OF FLAME/SMOKE/HEAT EXPOSURE TO TERMINAL STRIP S3-372 AND SEVERAL INCHES OF ALL 6 WIRES TERMINATED AT THIS LOCATION. THE 6 WIRES WERE THE 3 PHASES THAT POWERED TANK 2L AFT FUEL PUMP. THE TERMINAL STRIP IS MOUNTED ON THE LEFT WING AFT SPAR CLOSE TO THE PUMP RESET C/B RAN RTS ALL TEST PASSED, DUE TO HISTORY NEED MORE T/S TANK 2L PUMP C/B POPPED. NO REPORTED FAULTS IN MCDU. RESET BREAKER AND PERFORMED FSC R-T-S REF MD-10-30 AMM 28-00-00-5,TEST PASSED. RAN PUMPS IN MANUAL AND COULD NOT DUPLICATE C/B TO TRIP. SUSPECT WIRING ISSUE. ITEM HAS A LONG HISTORY OF C/B POPPED. PULLED AND COLLARED B1-680, OPENED LOWER WING PANEL UNDER NR 2L AFT PUMP, FOUND WIRES AT TERMINAL STRIP S3-372 SHORTED/BURNED REF WDM CH 28-22-02, PG5 SHT 2. STILL EVALUATING THE EXTENT OF DAMAGE AND REPAIR OPTIONS. REPLACED TERMINAL STRIP AT S3-372 THAT WAS BURNED. REF SRM 51-31-01, VOL 2. AVIONICS STILL NEEDS TO TERMINATE WIRING AND OPS CHECK SYS. INSPECTED WIRES, DAMAGED PORTION OF WIRES WAS REMOVED.