As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WET SOCK SMELL IN CABIN DURING DESCENT INTO PDX BELOW 10 000 SMELL ESPECIALLY STRONG DISSIPATED SLIGHTLY BELOW 6 000 FT. ACCOMP CABIN ODOR T/S PER MM 05 60 00 280 801C1. FOUND APU TO BE SOURCE. OIL FOUND IN DRAIN LINE FOR APU LOAD COMPRESSOR CASE. ACCOMP OIL CONTAMINATION REMOVAL FROM A/C & PNEUMATIC SYSTEMS FOR APU BLEED DUCTING. NO DEFECTS NOTED. ACCOMP APU OPERATIONS TEST PER AMM 49 11 00 710 801. OPS CHECK GOOD.