As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:ETOP WHEN LANDING GEAR EXTENDED APPROACH A STRONG ODOR OF BURNING RUBBER ENTERED THE COCKPIT. ODOR DISSIPATED BY LANDING. PERFORMED VISUAL INSPECTION OF INLET AND EXHAUST ON LEFT AND RIGHT PACK. RAN BOTH PACKS AT FULL HOT NO DISCREPANCIES NOTED.