What was found
AFT CABIN F/A REPORT SMOKE ODOR AND FLASHING EMERGENCY LIGHTS, CEILING AND FLOOR LEVEL. ACFT RETURNED TO GATE. F/A AT 2R GALLEY REPORTED BURNING, ACRID ODOR WITH NO SIGNS OF SMOKE. DISSIPATED IN 30 SECONDS. AS REPORTED BY FLT CREW, FLT 70-18 DEC10. FOUND SEAT MOUNTED EMERGENCY PATHWAY LIGHT WIRES CRUSHED UNDER SEAT 25ABC. REPAIRED WIRES. PRECAUTIONARILY REPLACED EPSU 13WL AND BATTERY, OP CHECKS OK.