As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH RT ENG FIRE LOOP SELECTED TO B DUE A ON PREV MCO GOT A FIRE WARNING ON THROTTLE UP FOR T/O TESTED BAD IN B-LOOP. FOUND LOWER FIRE SUPPORT BRACKET BROKEN AND GRD STUD LOOSE. REPLACED SUPPORT FIRE WARNING, TESTED GOOD AND CKED GOOD ON ENG RUN. ALSO, REMOVED MCO ON A LOOP DUE ALSO, TESTED OK.