As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT NOTICED A FAINT ELECTRICAL SMELL. AFTER LANDING NOTICED DRAIN MAST C/B POPPED. NO SMELL WHEN MTC ARRIVED. OPENED C/B PANELS IN C/P ALL OK. RAN PACKS WITH ENGINES AND APU, ALL OK. REMOVED SEVERAL OVERHEAD PANELS AND TURNED ON ALL C/P LIGHTING, ALL OK. OPERATED DRAIN MAST HEATER APPROX 1 HR C/B STAYED IN. NO SMELL COULD BE DUPLICATED.