As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST AFTER STARTING THE TAXI, A STRONG ELECTRICAL BURNING SMELL FILLED THE COCKPIT AND CABIN. TROUBLESHOT BURNING SMELL. CAUSE OF SMELL SUSPECTED TO BE ASSOCIATED STARTER GENERATOR FAILURE. REMOVED AND REPLACED RT ENGINE STARTER GENERATOR. PERFORMED GROUND RUNS AFTER STARTER GENERATOR REPLACEMENT AND OPERATED ALL ELECTRICAL SYSTEMS. NO DEFECTS NOTED AND NO BURNING SMELL PRESENT AT THIS TIME.