As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) 45 MINUTES AFTER TAKEOFF, BURNING ODOR WAS REPORTED IN THE PASSENGER CABIN AT ROW 17-18. ODOR DISAPPEARED AFTER 10 MINUTES. DURING INVESTIGATION FOUND LIGHT TRANSFORMER ON POWER UNIT 18 BURNED AND FUSE BLOWN. SUSPECT PROBLEM BEING CAUSED BY LIGHT SOCKET PINS, FOUND FUSED COMPLETE POWER UNIT. REPLACED AND SYSTEM TESTED SERVICEABLE.