As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED R ENG FIRE WARNING MESSAGE IN FLIGHT FOR APPROXIMATELY 4 SECONDS. MESSAGE SELF CLEARED BEFORE QRC PROCEDURE STARTED. ALL ENGINE INDICATIONS REMAINED NORMAL. ALL SYSTEM INDICATIONS REMAINED NORMAL. REMOVED AND REPLACED THE RH ENG FIRE DETECTION LOOP B IAW AMM. OPS CHECK GOOD.