As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY OIL & DIRTY SOCKS ODORS THROUGHOUT CABIN. CHECKED APU FOR OIL LEAKS AND BLEED DUCTS CONTAMINATION CHECKED OK. PERFORMED PACK BURN ECS CONTAMINATION IAW AMM 21-00-00-615-002, REPLACED BOTH OZONE FILTERS (100HM & 101HM) IAW AMM 21-51-41, OK FOR SERVICE.