As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FLIGHT ATTENDANT REPORTS BURNED TOAST ODOR NEAR PSU 37DEF, SAW SMOKE NEAR PSU APPROXIMATELY 1 HOUR INTO FLIGHT. PERFORMED CABIN ODOR & SMOKE TROUBLESHOOTING WORK CARD 21-059-002. FOUND PSU READING LIGHT SWITCH FROM SEAT 37D DEFECTIVE. SWITCH IS DEACTIVATED & PLACED ON NEF 25-01H-02 SIT 2 CAT D DMI 18412, PLACARD INSTALLED.