As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. DEADHEADING CREW MEMBERS REPORT ODOR IN CABIN AT DOOR 2 & 4, RESEMBLING ELEC BURNING, AFTER ENG START & TAXI. FOUND ROW 16 RT LIGHT BALLAST INOPERATIVE. REPLACED BALLAST & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO ODORS BEING NOTED IAW AMM 33-21-30-962-008 & TASK CARD 19L00021001.