As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR UPPER DECK STAIRWAY LIGHT. CHECKED FOUND THE ODOR IS FROM THE LIGHT L2976, REMOVED THE LIGHT L2976 AND DEACTIVATED BALLAST M7564, SO THE LIGHT L2977 IS INOP ALSO. PLZ REF TO WDM 33-29-21. DF DUE TIME. FOUND ONE OF THE LAMP SOCKETS BURNT AND CRACKED. REPLACED BALLAST AND LAMP HOLDERS, CKS OK.