As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CAPTAIN'S SIDE POST MAP LIGHT WAS SPARKING WITH AN ASSOCIATED ELECTRICAL FIRE SMELL WHEN LIGHT WAS MANIPULATED. IF LIGHT CASING WAS NOT MOVED, NO NOTED ABNORMALTIES. FOUND SWITCH TO BE LOOSE AND TIGHTENED THE JAM NUT ON THE SWITCH TO RESTORE IT TO NORMAL OPERATION. AIRCRAFT BACK IN SERVICE.