As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING ELECTRICAL INSULATOR ODOR. DISSIPATED WHEN GALLEY PWR SWITCH TURNED OFF AND PACKS 1 AND 3 TURNED OFF. CREW REPORTED PROBLEM AT 3,000 FT ON DESCENT, LASTED 2 MIN. INSPECTED GALLEYS AND PACK AREAS FOR DISCREPANCIES IN WIRING, NONE FOUND. RAN ENGS WITH PACS AND GALLEY POWER LOADED UP. COULD NOT DUPLICATE. A/C OK FOR SERVICE.