As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4281 THE CREW REPORTED THAT JUST PRIOR TO LANDING AII CREW MEMBERS BEGAN SMELLING A FAINT ABNORMAL ODOR. THE ODOR BECAME PROGRESSIVELY MORE PUNGENT AND WAS VERY STRONG. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 2 WINDSHIELD TEMP CONTROLLER IAW AMM 30-42-01. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.