As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOTED ODOR WHEN BOTH PACKS WERE ON. TURNED RT PACK OFF AND ODOR WENT AWAY, TURNED RT PACK ON AND LEFT PACK OFF, ODOR RETURNED. PERFORMED REMOVAL OF CONTAMINATION FROM A/C SYSTEM IAW MM 21-00-21-102-030. PACK OPS CHECKED NORMAL. NO ODOR NOTED.