As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROCKER SWITCH WHICH CONTROLS THE AIR CONDITIONING AND THE ENVIROMENTAL FANS WAS FOUND OVERHEATED. THE SWITCH HAS LOOSE TERMINALS AND CHECK WITH HIGH RESISTANCE. THE CIRCUIT BREAKER DID NOT TRIP AND IS LOCATED IN THE AFT ELECTRICAL COMPARTMENT.