As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS GROUNDED. SMELLED OIL FUMES WITH APU BLEED ON / STARTED ENGINES AND FUME SMELL CONTINUED. ACCOMPLISHED J/C 26L00021001, FOUND SOURCE OF CABIN ODOR TO BE APU. ACCOMPLISHED PACK BURN WITH ENGINES, NO ODORS NOTED AND AIRCRAFT IS OK FOR SERVICE.