As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING SULFUR SMELL IN FLIGHT DECK AND CABIN. IN CRUISE FL340 ODOR DISSIPATED. FACT 04MAY24 17:35 CLT INSPECTED PACK 1 AND 2 FOUND MELTED SLEEVES ON TEMP CONTROL VLV ON PACK 1 IRW AMM 21-51-00. RAN ENGINES AND PACK 2 WITH CREW. NO DEFECTS NOTED WITH PACK 1 OFF. SEE NEXT PAGE SEQ 1 FOR MEL OF PACK 1.