As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - FLT 632 - DURING CRUISE, A FAINT SMOKE ODOR WAS NOTICED IN CABIN. CLOSED NR 2 BLEED VALVE. FOUND LEFT AIR CYCLE MACHINE MALFUNCTIONING. REPLACED LEFT AIR CYCLE MACHINE, MFG P/N 204075-1. AIR CONDITIONING SYSTEM OPERATION THEN CHECKED NORMAL. CHECK C-3 - 9-12-95 - MCI.