As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5696 - IAD - FLIGHT CREW REPORTED FLIGHT ATTENDANT SMELLED ELECTRICAL SMOKE RIGHT AFTER TAXI OUT FROM GATE. IAD MX PERFORMED INSPECTION IN THE CABIN AND PERFORMED OPERATIONAL CHECK IN THE ELECTRIC SYSTEM - SMOKE SMELL WAS NOT DUPLICATED. ACFT WAS APPROVED TO RETURN TO SERVICE.