As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTING SDF CLIMBING THROUGH 8500 FT, NR 2 ENGINE ZONE 2, FIRE INDICATION LIGHT ILLUMINATED. CREW PERFORMED CHECKLISTS (IE PERFORMED ENGINE SHUTDOWN) AS REQUIRED AND RETURNED TO SDF. CREW REPORTED THAT NO VISUAL INDICATIONS OF FIRE, AND AFTER ENGINE COOLED DOWN, FIRE WARNING TEST STILL FAILED. FALSE FIRE WARNING INDICATION SUSPECTED.