As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE-N/A, FUMES SMELLED IN COCKPIT LIKE BURNING RUBBER. CHECKED CARGO AREA AND NO FUMES DETECTED. *S/D* REMOVED AND REPLACED LEFT PACK MIX VALVE DUCT (P/N 65-23579-2) OPS CHECK LEFT PACK OK. THIS CLEARS M120048 PLACARD REMOVED.