As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OPERATION SMOKE WAS NOTICED IN THE COCKPIT AND A PRCAUTIONARY LANDING WAS MADE. MAINTENANCE FOUND THE FORWARD EVAPORATOR BLOWER MOTOR, WHEN OPERATED ON HIGH, BEGAN TO SLOW AND SMOKE AFTER APPROXIMATELY 15 MINUTES. SUSPECTED THAT THE PROBLEM WAS IN THE ARMATURE WINDINGS.