As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF DFW AT 500 FT AGL, GOT LAV SMOKE WARNING ON EICAS. FLIGHT ATTENDANT VERIFIED NO SMOKE OR ODOR. EICAS MSG CLEARED AFTER 2 MINUTES. CLEANED LAV SMOKE DETECTOR. THE SAME PROBLEM OCCURRED THREE TIMES AGAIN OF IND ON 1/15, CMH ON 1/16, AND CMH ON 1/17. THE LAV SMOKE DETECTOR AND PANEL WAS REPLACED. THE FINAL FIX WAS REPLACEMENT OF NR 2 ENGINE DUE TO SUSPECTED CAUSE OF FALSE SMOKE WARNING. NO FURTHER PROBLEMS REPORTED.