As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3511 - AFTER TAKEOFF, NR 2 ENGINE GIVES FALSE WARNINGS ON BOTH HANDLE AND CAPTAIN'S WARNING PANEL. AIRCRAFT TURNED BACK. MAINTENANCE INSPECTED AND REPLACED ENGINE FIRE LOOP. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (X)