As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK FCV R ONE (BUT NOT BOTH) OF THE 2 RT PACK FLOW CONTROL VALVES (FCV) ARE NOT IN THE COMMANDED POSITION. STATUS MSG-2124102 LATCHED ES MODE. TRIED NEW CONTROLLER NO HELP. REINSTALLED OLD CONTROLLER. NEEDS FURTHER TROUBLESHOOTING. R & R UPPER FCSOV. PASSED AIR ON TEST.