As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MHR - DURING CLIMB-OUT, NR 3 ENGINE FIRE WARNING CAME ON. SHUT DOWN THE ENGINE, DISCHARGED BOTH RIGHT WING FIRE BOTLES. RETURNED TO MHR. INSPECTED ENGINE, FOUND NO EVIDENCE OF FIRE. INSPECTED FIRE DETECTION SYSTEM AND CLEANED CONNECTOR ON LOWER LOOP. RESISTANCE AND OPERATION CHECK WERE NORMAL. REPLACED BOTH RIGHT WING FIRE BOTTLES. (X)