As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. CABIN ODOR COMING FROM PACK SYS. ODOR WAS SEVERE & TOXIC NATURE. FOUND AN OIL LEAK AT THE APU STARTER & REPLACED THE O RINGS ON THE STARTER & STARTER ADAPTER IAW AMM 49-42-51. A SATISFACTORY LEAK & OPERATIONAL CHECK WAS ACCOMPLISHED. NO ADDITIONAL ODORS WERE NOTED.