What was found
AIRCRAFT WAS GROUNDED. AFTER TAKEOFF F/A COMPLAINED OF UNIDENTIFIED ODOR, PASSENGERS ALSO COMPLAINED. ODOR HAD A FAINT ELECTRICAL SMELL. AIRCRAFT RETURNED TO DFW WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. SUPPLEMENTAL: ACCOMPLISHED APU SMOKE ODOR TROUBLESHOOTING TASK CARD 26L00021002, APU COMPRESOR CLEANING, AS PER AMM 49-20-100-004-A AND PACK DECONTAMINATION PER TASK CARD 26L00021004 WITH NO ODORS NOTE. AIRCRAFT RETURNED TO SERVICE. (SUPPLEMENTAL CLOSED)