As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNT OIL/RUBBER SMELL DECENDING AT IDLE APROX 8000 FT. TURNED OFF PACK 1 SMELL DISSAPATED-PERFORMED TSM 05-50-00-810-831 IDENTIFY CAUSE OF CABIN ODOR. AFTER ISOLATION OF BLEED SYSTEM AND DECISION TABLE FOUND PACK 1 TO BE SOURCE OF CONTAMINATION. REF LP 2443737 ITEM 2