As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, IN FLIGHT ENGINE SHUTDOWN AND DECLARED EMERGENCY. NR 2 ENGINE OVERHEAT LIGHT ILLUMINATED DURING FLIGHT. INSPECTED ENGINE FOR SIGNS OF OVERHEAT, NONE NOTED. BULBS REMOVED FROM NR 2 ENGINE OVERHEAT LIGHT. OK TO CONTINUE PER MEL. LATER AT MDW REMOVED AND REPLACED ENGINE AND APU FIRE ACCESSORY UNIT.