As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL SMOKE SMELL NOTICED, HOWEVER, NOT VISIBLE FROM DESCENT TO BELOW FL 200 - INCREASING UNTIL RUNNING QRH (QUICK REFERENCE HANDBOOK) CHECKLIST BEFORE APPROACH. FOUND EQUIPMENT COOLING SUPPLY FAN EXCESSIVELY NOISY AND HOT. SYSTEM DEFERRED AS A PRELUDE TO REPLACEMENT OF THE FAULTY COOLING SUPPLY FAN.