As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDIS 655 21-01 1886972 27OCT19 PHL CLOSE PACK 1 OVRLOAD FOLLOWED BY BURNING RUBBER SMELL NOTI CED IN CABIN AND COCKPIT. SMELL WENT AWAY WHEN PACK 1 WAS TURNED OFF. FACT 27OCT19 23:54 PHL R&R'D #1 PACK OVERPRESSURE SWITCH IN REF TO AMM 21-5 1-06 OPS CHECK #1 PACK SEVERAL TIMES USING APU AND E NG #1 AND #2, NO DEFECTS NOTED AT THIS TIME. OK FOR