As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK OFF LIGHT ON L PACK. PERFORMED FIM 21-51 FT 803. REMOVED AND REPLACED CABIN AIR SENSOR IAW AMM 71-51-08 NO FIX. FUTHER TROUBLESHOOTING REQ. THIS DMI REMAINS OPEN. REMOVED AND REPLACED LT FLOW CONTROL VALVE ASSY IAW AMM 21-51-01, OPS CHECK GOOD, NO DEFECTS NOTED AT THIS TIME. CLEARED DMI 145663, PLACARD REMOVED MCC NOTIFIED.