As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ELECTRICAL BURNING SMELL AFTER ENGINE START. AMP METER INDICATED 0 AND VOLTAGE WAS -25. SHUTDOWN ENGINE AND UNLOADED PASSENGERS. STARTER GENERATOR WAS FOUND ARCING AND SMOKING WHEN CRANKED. REPLACED STARTER GENERATOR WITH SERVICEABLE ONE, OPS CHECK GOOD TL-017536-2010, 6/6/2010.