As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT, A STRONG ODOR OF SMOKE WAS IN THE COCKPIT. DECLARED AN EMERGENCY AND LANDED. RAN QUICK REFERENCE HANDBOOK PROCEDURES AND ODOR DISSAPATED AROUND 15,000 FEET. REPLACED THE AVIONICS BLOWER FAN 20HQ IAW AMM 21-26-51. OPS CHECKED GOOD. AIRCRAFT WAS GROUNDED.