As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, CREW NOTICED MILD BURNING SMELL IN CREW REST AREA. TURNED OFF INDIRECT LIGHTS AND THE SMELL DISSIPATED. ON GROUND, DISCOVERED OVERHEATING UPWASH AND DOWNWASH POWER SUPPLY. REPLACED POWER SUPPLY IAW GLEX AMM 33-21-00. OPS TEST SATISFACTORY.