As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ODOR REPORTED BY FLIGHT ATTENDANT THROUGHOUT CABIN (DIRTY OILY) WHEN PACKS ARE ON APU. MAINTENANCE TROUBLESHOT AS PER J/C 26L00021001. FOUND SOURCE OF SMELL TO BE THE APU. REMOVED AND REPLACED APU TURBINE CAVITY VENT TUBES PACKING PER MM 49-91-53. OPS CHECK GOOD. NO LEAKS NOTED. COMPLIED WITH J/C 26L000021004, DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM. NO ODORS NOTED.