What was found
(CAN) NR 1 NACELLE FUEL LEAK TAKEN TO THE HANGER. UPON OPENING COWL AT THE HANGER , EVIDENCE OF A FIRE WAS FOUND. WAS ORIGINALLY REPORTED AS A POSSIBLE HYDRAULIC LEAK NR 1 NACELLE. PRELIMINARY INVESTIGATION FOUND RESIDUAL FUEL ON INBOARD SIDE OF LEFT ENGINE. DURING THE COURSE OF INSPECTING THE WIRING IN PROXIMITY OF BURNED CLAMPING, A WIRE WAS FOUND TO HAVE CHAFED THROUGH A FUEL LINE (IPC, 71-71-00 FIG 10 ITEM 80- P/N-82821013-107). EVIDENCE OF BURNING AND ARCING WERE FOUND ON THE LINE AND THE WIRING SHOWED BARE METAL. THIS LINE (ENGINE WASTE FUEL RETURN) HAS BEEN REPLACED. AFFECTED WIRING ALSO REPLACED. REF: IPC 71-70-00 FIG 10 ITEM 80.