As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 23, DCA-DJT. DURING DESCENT 14000 MSL LIGHT INTENSITY ODOR DIRTY SOCK IN COCKPIT - PACK ONE OFF SEEMED TO DIMINISH ODOR. HISTORY OF ODOR ON AIRCRAFT; COMPLIED WITH INFORMATION NOTICE 2017-T015, STEPS 1 AND 2. IDENTIFIED ODOR AS TYPE 1- APU ODOR FOUDN APU COOLER FAN LEAKING OIL REMOVED AND REPLACED COOLING FAN ASSY IAW AMM 49-52-51. DECONTAMINATION LEVEL A ACCOMPLISHED PER AMM 21-00-00-615-802A. AIRCRAFT IS OK FOR SERVICE.