As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF PASSING THROUGH APPROXIMATELY 4,000 MSL, SMOKE AND A STRONG ODOR FOLLOWED BY THE LAVATORY SMOKE DETECTOR AURAL WARNING. SMOKE BEGIN TO DISSIPATE ON FINAL APPROACH. TRANSFERRED NR 1 PACK TO DMI PER MEL 21-1-20 AFTER HAVING TROUBLE SHOOT AND FOUND SMOKE AND ODOR TO BE COMING FROM NR 1 PACK. TO REMAIN OPEN TILL FINAL FIX FINAL FIX SEE SDR EIA2007119.