As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE COCKPIT CABIN, ELECTRICAL BURNING ODOR, RIGHT PACK TRIP OFF LIGHT ALL DURING ENGINE STARTS. FOUND CABIN RE-CIRCULATION FAN FAILED. REPLACED CABIN RE-CIRCULATION FAN. BEARINGS DRY AND UNIT DIRTY. CLEANED UNIT AND REPLACED BEARINGS.