As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT PASSING TRHOUGH A SMOKY HAZY LAYER ON ODER ENTERED THE FLIGHT DECK. DISSIPATED AFTER 30 SEC. AFTER ENG SHUTDOWN W/APU RUNNING & AIR SELECTED ON THE SMELL/ODOR REOCCRRED. APPEARS TO BE EMANATING FROM THE REFRIG. VERIFIED SMELL IS CONCENTRATED AT REFRIG EXHAUST VENT. FAN RUN HOT. DEF, REFRIG IAW NEF 25-22-25-30-09REMOVED AND REPLACED REFRIGERATOR IAW AMM 25-37-57.