As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OBSERVERS MAP LIGHT CAME UNATTACHED AND WAS TOUCHING THE CIRCUIT BREAKER PANEL MAKING SPARKS. LANDED BRU WITHOUT INCIDENT. FOUND SHORT CIRCUIT IN FIRST OBSERVER MAP LIGHT. BREAKER UTILITY PULLED AND SECURED IAW MEL 33-1A 12-352D-C. SECURED WIRING TO GROUND AT JFK.