As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NAVIGATION LIGHTS INOPERATIVE. ON TROUBLESHOOTING, THE TECH FOUND THE CIRCUIT BREAKER AT FAULT. INSTALLED NEW CIRCUIT BREAKER. OPS CHECKED OK. SWITCH THAT FAILED WAS INSTALLED TO COMPLY WITH AD 2008-13-17. THIS ACFT HAS HAD 6 OF THE IMPROVED CIRCUIT BREAKER FAIL IN THE LAST 2600HRS OF OPERATION.