As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEVEL 3 FIRE WARNING, NR 3 ENG INTERMITTENT ON CLIMBOUT. ON/OFF SEVERAL TIMES, FOLLOWED BY LEVEL 1 ENG 3 FIRE DET FAIL. SECOND ALERT WAS INTERMITTENT FOR 20 MINS. BOTH WERE OFF IN CRUISE. ISSUED DMI PER MEL 26-11-01-01 CAT C LOOP "B" FAIL DM: M26JU1111-76 DUE 21 JUNE 2011. PLACARD INSTALLED. TROUBLESHOOTING THROUGH PREVIOUS LEGS SHOW LOOP "B" FAIL.