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 CB NOT POPPED AND NO APPARENT SHORTS FOUND. INVESTIGATION REVEALED CIRCUIT TRACE ON THE PCB SUPPLYING POWER TO THE POSITION LIGHT SWITCH HAD MELTED/BLOWN LIKE A FUSE. THIS A COMMON PROBLEM FOR THIS PART. SUGGEST MORE ROBUST TRACE BE APPLIED TO PCB CIRCUIT. REDUCTION OF CB AMPERAGE PROTECTION VALUE OR A REDESIGN OF CIRCUIT WHICH MAY BE FAULTY. (K)