Two Mechanics report about repairing damaged electrical wiring in the forward pit ceiling of a B777-200; but overlooked three other small wires previously written up; next to the Center-2 Hydraulic pump wires.

Narrative

On the last 3 hours of our 11+ hour shift; we were assigned to repair damaged wires in the forward pit ceiling of aircraft. There was no turnover from previous crews working the aircraft. We reviewed the General Manual Boeing Standard Practices Manual for wire repair; and then went to the aircraft to inspect the damage. We found 2 small wires that had slightly damaged insulation in approximately 1/8 inch area. This area was cut out; the wire stripped; inspected; spliced per the General Manual 2-0-15. 1 small wire that had slight discoloration on the insulation but appeared serviceable was wrapped with Teflon tape for good measure. The 2 C2 hydraulic pump aluminum cables that were damaged; were spliced with AMP copalum splices; per the Boeing Standard Wiring Practice Manual 20-30-13. The third cable was wrapped with Teflon tape for good measure. At this point we were past the end of our shift; so we closed up the aircraft. There was no power on the aircraft at any time and the hydraulic pump connector was disassembled; so we could not check its operation. The splice repair on the C2 cables was signed off and continued the item for securing and close-up. I overlooked the write-up for the 3 small wires next to the C2 pump cables. There was no one to turn the job over to.