As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG SMELL OF SMOKE IN COCKPIT DURING DESCENT THROUGH 13000 FEET. NO VISUAL SMOKE INDICATION. NO SMOKE SMELL IN THE CABIN. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. FIREFIGHTERS DID NOT FIND ABNORMAL HEAT SPOTS. R&R LH RECIRCULATION FAN.