As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 650 21-50 1891911 27OCT19 DCA CLOSE BURNING RUBBER SMELL NOTICED IN CABIN AND COCKPIT. S MELL WENT WHEN PACK 1 WAS TURNED OFF. FACT 27OCT19 02:33 ALB MX INSP AND DETERMINED SMELL IS ONLY ASSOCIATED WITH PACK 1. OPERATED BOTH PACK SYSTEMS FOR 30 MINUTES FROM COLD TO HOT AND FOUND NO IRREGULAR SMELLS. WORK WAS DONEIAW E145 AMM 21-00-00 OPS CHECK GOOD MEL 21-13-2 CLOSED.