As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA SAW SPARKS COMING OUT OF THE WINDOW LIGHTS OVER ROW 2F WHEN BATTERIES ARE ON, NO LIGHT IN THE CABIN ILLUMINATES. INSPECTED LIGHT AND SOCKETS AT ROW 2 & 3, NO DEFECTS NOTED. PERFORMED OPERATIONAL TEST OF CABIN LIGHTS SYSTEM IAW AMM 33-21-05-05 WINDOW LIGHT AT SEAT 8A FOUND INOPERATIVE. DEFERRED IAW MEL 33-20-1-1 CAT C ID 31077. (K)