As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CAB IN AND COCKPIT. SOURCE UNDETERMINED. LANDED STL WITHOUT INCIDENT. REPLACED LEFT PACK 130 DEGREE TEMPERATURE LIMIT SWITCH AND BOTH WATER SEPARATORS. ACCOMPLISHED SPECIAL ITEMS CARD 21 96 01. SYSTEM GROUND CHECKED NORMAL OPERATIONS.