As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RAMP REPORTS "ELECTRICAL SMELL" NOTED WHEN UNPLUGGING GPU AFTER POWERING AIRCRAFT DOWN. REMOVED FROM SERVICE. PERFORMED GVI OF FWD FUSELAGE AREA AND GPU CONNECTION PORT. NO DEFECTS OR ABNORMAL SMELLS NOTED. SMELL BELIEVED NOT TO ORIGINATE FROM ANY AIRCRAFT DISCREPANCY. RETURNED TO SERVICE.