As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A SMOKY ODOR WAS REPORTED IN THE COCKPIT AND CABIN WHILE ON DESCENT INTO LAS. THE ODOR CLEARED WITHIN 2-3 MINUTES. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED INSPECTIONS IAW MM 05-51-58 AND LOCATED THE SOURCE OF THE ODOR AS COMING FROM A FAILED FORWARD EQUIPMENT COOLING FAN. THE FORWARD EQUIPMENT COOLING FAN WAS REMOVED AND REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD IAW MM 21-58-06.