Narrative:

After takeoff sfo, flight attendant reported smoke in aft cabin. Completed aircraft smoke/fumes checklist. Some lessened but did not stop. Returned sfo. Declared emergency. Landed overweight at 144000 pounds. Wrote up above in aircraft log. Smooth landing runway 28R sfo. Swapped aircraft and continued dfw. Most ramp personnel and fuelers had gone home. Minimum crew swapped aircraft.

Google
 

Original NASA ASRS Text

Title: AN MD80 IN INITIAL CLB DECLARED AN EMER AND DIVERTED DUE TO SMOKE IN THE AFT CABIN CAUSE UNKNOWN.

Narrative: AFTER TKOF SFO, FLT ATTENDANT RPTED SMOKE IN AFT CABIN. COMPLETED ACFT SMOKE/FUMES CHKLIST. SOME LESSENED BUT DID NOT STOP. RETURNED SFO. DECLARED EMER. LANDED OVERWT AT 144000 LBS. WROTE UP ABOVE IN ACFT LOG. SMOOTH LNDG RWY 28R SFO. SWAPPED ACFT AND CONTINUED DFW. MOST RAMP PERSONNEL AND FUELERS HAD GONE HOME. MINIMUM CREW SWAPPED ACFT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.