As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW NOTICED ELECTRICAL SMOKE SMELL DURING TAXI. DID BTB FOR FURTHER INSPECTION. CREW COULD NOT DETERMINE SOURCE. FOUND AIR DISTRIBUTION DUCT INSULATION DETERIORATED AND HAD FALLEN ACROSS WIRING & C/B'S IN THE UPPER PORTION OF THE OVERHEAD P-11 PANEL. REMOVED DETERIORATED INSULATION & CLEANED BACK OF P-11 PANELS, NO OTHER FAULTS NOTED.