As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR CO2996, CREW REPORTED NR 1 ENGINE FIRE INDICATION DURING TAXI. NO FIRE, RETURNED TO THE GATE. MAINTENANCE INSPECTED AIRCRAFT PERFORMED DETAIL VISUAL INSPECTION FOUND NO EVIDENCE OF FIRE. PERFORMED ENGINE RUN ON NR 1 ENGINE FOR 15 MINUTES. NO FAULT FOUND IAW ATR42 MM 72-00-00. AIRCRAFT RETURNED TO SERVICE.