As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, FA'S CALLED AND REPORTED A BURNING RUBBER SMELL. THE SMELL WAS ONLY DETECTED DURING DESCENT AND LANDING. THE ODOR DECREASED IN INTENSITY AFTER CABIN TEMPERATURE WAS LOWERED FULLY BUT DID NOT DISSAPATE. ODOR COMPLETELY DISSAPATED AFTER ENGINE SHUT-DOWN. ODOR IS NOT DETECTED WITH THE APU BLEED AIR. REMOVED FROM SERVICE. PLACED BLEED SYSTEM ON MEL 36-00-00A. RETURNED TO SERVICE.