As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUR MINUTES AFTER TAKEOFF STX AT 2145, HAD A FIRE WARNING, NR 3 ENGINE MADE SHUTDOWN PER PROCEDURES. RETURNED TO STX. TROUBLE-SHOT SYSTEM, NR 3 FOUND FIRE DETECTION LOOP BAD. REMOVED AND REPLACED FIRE DETECTION LOOP. CHECKS GOOD MM 26-12-00 A AND B SYSTEM. (M)