As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE LANDING LIGHT CIRCUIT BREAKER SWITCH WAS NOT STAYING IN THE "ON" POSITION. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT CIRCUIT BREAKER SWITCH FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.