As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. WITH APU BLEED ON, EXTREME MUSTY DIRTY SMELL REPORTED. MX NOTED THE APU WAS WET WITH OIL & REPLACED IT IAW TASK CARD 26L31049005, ACCOMPLISHED DECONTAMINATION CARDS 26L0021001, 26L00021002 & 26L00021004 WITH NO ADDITIONAL ODORS NOTED. ACFT WAS RETURNED TO SERVICE.