As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, HAZE ACCOMPANIED BY AN ELEC ODOR WAS REPORTED IN THE FWD CABIN AREA CONCENTRATED AT ROW 5B. PAX ENTERTAINMENT SYS WAS DE-ACTIVATED & QRH COMPLIED WITH. HAZE DISSIPATED. AIRCRAFT WAS GROUNDED. ACCOMPLISHED MCM 21-96-01 & FOUND A DEFECTIVE FWD CARGO HEAT DUCT. R & R DUCT IAW AMM 21-41-01. OPERATIONAL CHECKED NORMAL.