As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO DESCENT HAD A STRONG ELECTRICAL BURNING SMELL WITH NO VISUAL CUES. CHECKED C/BS AND TURNED BOTH UTILITY BUSSES OFF AND SMELL DISAPPEAR. INSPECTED MAIN AVIONICS BAY, UNDERNOSE BAY AND REAR OF MAINT TEST PANEL FOR ANOMALIES OR BURNING SMELL. KEPT GALLEY POWER AND ALL AVIONICS TURNED ON FOR ALL TRANSIT TIME, NOTHING TO REPORT.