As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT FLIGHT 2035 - THE CREW REPORTED A LAV SMOKE WARNING AFTER PASSING THRU 3000FT. ALSO HAD A ELECTRICAL BURNING SMELL IN THE COCKPIT AND CABIN. THE AIRCRAFT RETURNED TO PIT AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR 2 ENGINE. OPERATIONAL CHECKS WERE GOOD. SUPPLEMENT TO FOLLOW