As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMELLED BURNING ELECTRIC FOR ABOUT 30 SEC ONLY IN COCKPIT NO SMOKE ASSOCIATED W/SMELL. CONDUCTED VISUAL INSPECTION OF AVIONICS COMPARTMENT AND NO DEFECTS FOUND AT THIS TIME. PERFORMED 10 MINUTE GROUND RUN. NO DEFECTS OF SMELLS ACCURD. OPS CHECK GOOD. OK FOR SERVICE. TSM 05-50-00-810-831A