What was found
SUPPLEMENTAL INFORMATION: FLT 860, PHL-BOS. EMERGENCY DECLARED. RETURNED TO FIELD. ENG 2 FIRE INDICATION IN FLIGHT; REF LOG PAGE 2702474 ITEM #1, FOUND W8C HARNESS WITH HEAT DAMAGE AND NEEDS REPLACEMENT. REPLACED HARNESS PER EMM 72-00-00 ON #2 ENG W9B HARNESS. OK FOR SERVICE. REFERENCE LOG PAGES 2702475, 2702476, 2702477, 2702478, 2702479 FOR CORRECTIVE ACTIONS. THIS AIRCRAFT IS OK TO CONTINUE SERVICE. HIGH POWER RUNS SATISFACTORY.