As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE T/S WING NACELLE & FLOOD LIGHTS C/B POPPING NOTICED ELECTRICAL SMELL AND SMOKE FILLING UP THE FIRST CLASS SECTION MAINLY. NO SMOKE IN THE AFT CABIN NOR IN THE FLIGHT DECK. NO PASSENGERS WERE ON BOARD. FOUND T1-10 TRANSFORMER INOP. R&R OF T1-10 TRANSFORMER PER AMM 33-41-02. OPS CHK NRML. ALSO R&R OF NACELLE & FLOOD LAMP. THERE WAS NOT AN NO-GO-ODI-PREVENTION EVENT AT THIS TIME. A/C OK FOR SVC.