As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NAVIGATION LIGHTS CIRCUIT BREAKER DID NOT TRIP OFF AS A RESULT OF A SHORTED WIRE. THIS OVERHEATED THE WIRE ALLOWING IT TO MELT THE INSULATION OFF OF TWO OTHER CIRCUITS WHICH SHORTED OUT THESE CIRCUITS AND THEIR RESPECTIVE CIRCUIT BREAKERS TRIPPED.