As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POSITION LIGHTS FAILED TO ILLUMINATE WITH CIRCUIT BREAKER IN CLOSED POSITION AND NO APPARENT OPENS OR SHORTS IN THE WIRE HARNESS. INVESTIGATION REVEALED THAT THE PCB TRACE FOR THE POSITION LIGHT SWITCH POWER HAD MELTED MUCH AS A FUSE BLOWS. THIS IS NOT AN UNCOMMON PROBLEM FOR THIS PART. SUGGEST A CLOSE LOOK AT THE CURRENT PATH FOR THIS CIRCUIT TO SEE WHY THE CIRCUIT BREAKER PROTECTION FAILS TO PROTECT THE SWITCH PANEL PERHAPS A MORE ROBUST CIRCUIT TRACE IS REQUIRED ON THE PCB FOR THIS CIRCUIT. (K)