What was found
ENG 1 OVERHEAT LIGHT IS ON ENG1 OVERHEAT ON CLIMB THROTTLE AT IDLE FOR AT LEAST 5 MINS BEFORE LIGHT WENT OUT SMOOTH. EMERGENCY DECLARED. CAPT REPORTED THAT EGT WAS NOT EXCEEDED NOR DID HE GET AN ENGINE FIRE INDICATION. ALL PARAMETERS WERE NORMAL. PERFORMED ENGINE F IRE CONDITION PER FIM 26-10-00-810-811 ALL INDICATIONS NORMAL. PERFORMED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE PROCEDURE REF FIM 26-10-00-810-801 BITE PASSED. PERFORMED ENGINE- WIRING HARNESS/FIRE DETECTOR - FAULT ISOLATION REF FIM 26-10-00-810-805 ALL ENGINE LOOP RESISTANCES WITHIN RANGE. REMOVED AND REPLACED ENGINE AND APU FIRE CONTROL PANEL REF AMM 26-00-01-000-801 AND 2 6-10-01-400-801 INSTALLATION TESTS ALL NORMAL. ALSO PRIOR TO CHANGING PANEL PERFORMED POWER ASSURANCE RUN & COULD NOT DUPLICATE.