As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE, SMOKE IN COCKPIT. SHUTDOWN CABIN HEATERS, ELIMINATED SMOKE. SUSPECT NR 1 SUPERCHARGER SYSTEM. PULLED MAGNETIC PLUG ON THE NR 1 CSC, FOUND TO BE FULL OF METAL. SYSTEM DEFERRED PER MEL 21-1 AT 0800 ON 9-27-01Z. CSC TO BE REPLACED.