As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DCA - ON APPROACH INTO DCA, CREW REPORTED A CONTINUED STRONG SULFUR SMELL IN THE CABIN. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE VERIFIED THE SMELL COMING FROM THE NORMAL EQUIPMENT COOLING BLOWER. REMOVED AND REPLACED THE NORMAL EQUIPMENT COOLING BLOWER PER MM 21-58-12. OPERATIONAL CHECK GOOD.