As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK FCV LWR L EICAS STATUS THE LOWER LEFT PACK FLOW CONTROL VALVES (FCV) IS NOT IN THE COMMANDED POSITION. MSG 21-24303. REPLACED LWR FCV PER AMM21-51-02. LRU GRD TEST PASSED. MSG DISAPPEARED. ROTABLE PARTS CHANGE WAS INDICATED - TT 1273491 SN OFF 0056 VALVE, AIR, PAC OFF 25-2151-9-0002 0056 ON 25-2151-9-0002 0135.