As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE LOOP-B LIGHT ILLUMINATED APPROXIMATELY 2 TO 3 MINUTES AFTER TAKEOFF. LIGHT STAYED ON FOR VARIOUS AMOUNTS OF TIME ON SEVERAL OCCASIONS. THE RIGHT ENGINE FIRE WARNING LIGHT AND BELL OCCURRED WHEN CONDUCTING THE SINGLE LOOP TEST. LOOP B TESTED OK. MOST OF THE WARNINGS OCCURRED AT HIGH POWER SETTINGS. REPLACED ANTI-ICE TUBE ON NR 2 ENGINE. SYSTEM GROUND CHECKED NORMAL OPERATION.