As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEIRD ODOR COMING OUT OF PACKS, INITIAL ENTRY INTO CABIN WITH PAX ON BOARD AND PACKS OPERATING INDICATES MODERATE ACIDIC-RUBBER LIKE ODOR. RECIRC FAN SYSTEMS AND ETC. REMOVED FORWARD CARGO COMPARTMENT AFT BULKHEAD LINER REMOVAL AND FOUND ODOR COMING FROM RT RECIRC FAN. REMOVED AND REPLACED RT RECIRCULATION FAN IAW 21-25-02. REMOVED AND REPLACED RT RECIRCULATION FAN REF AMM 21-25-02. OPS CHECK OK FAN WORKS NO LEAKS.