As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE, RECEIVED A LEVEL 3 "ENG 3 FIRE" ALERT. APPEARED FOR APPROX 30 SECONDS THEN WENT OUT, THEN ONE MINUTE LATER RETURNED. SHUTDOWN ENGINE IAW QRH. FIRE WARNING CAME ON THREE MORE TIMES. FIRED SECOND BOTTLE, DECLARED EMERGENCY. R & R BOTH LOOPS A & B WIRE HARNESSES ON NR 3 ENG REF AMM 71-50-04-4-1. NR 3 ENG FIRE DETECTION SYS OPS CHECKED NORMAL IAW AMM 26-11-02-5.