As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEFECT 802437: VERY PUNDJENT MUSTY SMELL COMING THROUGH THE AIR VENTS ON DECENT AND ONLY ON DESENT RESOLUTION: REMOVED AND REPLACED LEFT & RIGHT RECIRCULATION HEPA FILTERS. REF. 21-25-01-400-801. REMOVED AND REPLACED EQIP COOLING FAN FILTER REF 27-21-01-400-801. PERFORMED OPS CHECK ON B OTH. NO ISSUE FOUND.