As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PLANE CABIN SMELLS OF DEAD FISH/SEWAGE-T/S IAW TSM 05-50-00-810-831-A. FOUND OIL PUDDLE(SMALL) BEHIND APU INLET. CLEANED AREA, INSPECTED APU BLEED DUCT, FOUND NO OIL RESIDUE. PERFORMED PACK BURNOUT FOR #1 AND #2 PACKS IAW AMM 21-00-00. BURNOUT WAS GOOD.LEAK CHECK GOOD. A/C OKAY FOR SERVICE.