As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH EMERGENCY EXIT LIGHT SWITCH SELECTED TO 'ARM', THE EMERGENCY LIGHT CAME 'ON'. FOUND CB OPEN ON P7 GRID G15. RESET CB AND TESTED OKAY. UPON ACFT ARRIVAL FOUND TEST SWITCH AT DOOR 1L ACTUATED AND SWITCH GUARD MISSING. REPLACED SWITCH GUARD. GROUND CHECKED OKAY.