As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RNO - FLIGHT 2551 - ON DESCENT, RECEIVED A NR 2 FIRE WARNING. SHUT DOWN THE ENGINE AND DISCHARGED BOTH FIRE BOTTLES. CFR CALLED. ACCOMPLISHED A UNEVENTFUL LANDING. MAINTENANCE INSPECTED AND FOUND NO EVIDENCE OF A FIRE OR DAMAGE. REPLACED THE NR 2 PEC FIRE LOOP. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.